I'm at my wits end with this problem. I feel like i've read / tried a billion different things to no avail.
The store is just locked all the time and it's a pain in the rear end.
I know it has something to do with Froscrag spire / the UOMP fix because when i disable those 2 and load the save and wait 24 hours the door unlocks.
If I load them both it stays locked and if I pick the lock or use the console Unlock command and go in the elf chick gets all pissed and if I leave its still locked, if I unlock the top stairs room and leave it still stays locked, I've tried messing with the load orders, etc. idk what else to do.
I'm using UOP/USIP/UOMP/UOPS and I installed them in that order as well.

The fix can easily be overwritten by other mods that effect that area or the NPCs within. The fix is pretty simple, you can use TES4Edit to combine changes from all your mods effecting those things into a separate patch.

I have been able to fix almost all load order compatibility type issues with this for myself.

It's a problem with having Frostcrag Spire and any other mod that alters the shop/owner (Unoffical patches do that - because fixes were needed.)

Try this, should fix it right up:
http://www.tesnexus.com/downloads/file.php?id=12745

EDIT: According to the author of the mod; "UOMP Frostcrag should solve the problem if you make sure it's loading after DLCBattlehorn."
So try that first in order to avoid the need for an extra patch .esp file.

Well the TSE edit program helped me find the conflict and changing the load order fixed it; BUT now I hear this obnoxious 1 beat "drum" sound every couple of seconds no matter what im doing.

Are you using vanilla Frostcrag?? Or something like Frostcrag Reborn?? Also if you have correctly BOSS'd your load order there should not be any problems, and certainly no need for editing the UOMP in TES4EDIT.

What? It's vanilla frostcrag first followed by the UOPS version (which was installed after UOMP). I don't know what you mean by BOSS'd I just used TS4Edit to see where the conflicts were then I used OBMM to move the merchant money mod I had above Frostcrag because it was taking Calandil or whatever off the ICMysticEmporium faction.

Now I just need to figure out this damn constant drumming noise.

http://www.tesnexus.com/downloads/file.php?id=20516

It is a long running project that sorts all your mods into their optimal order.
These days you will most likely get the response of "don't bother asking about load order issues until you have sorted your mods through BOSS first."

Well I ended up isolating what was making the constant drumming noise and fixed it but I'm curious what some of the stuff in my BOSS report means.

Better Oblivion Sorting Software Log
? Random007 & the BOSS development team, 2009-2011. Some rights reserved.
CC Attribution-Noncommercial-No Derivative Works 3.0
v1.8 (July 6, 2011)
Use Dark Colour SchemeHide Rule WarningsHide Version NumbersHide 'Ghosted' LabelHide ChecksumsHide Messageless ModsHide Ghosted ModsHide All Mod MessagesHide NotesHide Bash Tag SuggestionsHide RequirementsHide Incompatibilities
?Masterlist Update
masterlist.txt is already at the latest version. Update aborted.
?Summary
Mods sorted by your userlist are counted as recognised, not unrecognised, plugins.

Number of recognised plugins: 35 Number of warning messages: 0
Number of unrecognised plugins: 0 Number of error messages: 0
Number of ghosted plugins: 0 Total number of messages: 39
Total number of plugins: 35
?Userlist Messages
No valid rules were found in your userlist.txt.
?OBSE And OBSE Plugin Checksums
OBSEVersion: 0.0.20.6Checksum: 9EB2FCE7
AVUncapper.dllChecksum: 84F74BCB
AVUncapper_CS.dllChecksum: 5E251DBC
FastExit2.dllChecksum: F1243BCE
?Recognised And Re-ordered Plugins
Oblivion.esmChecksum: 2FF840C5
Note: Masterlist Revision: 3177 (Aug 24, 2011)
Unofficial Oblivion Patch.espVersion 3.3.7Checksum: 6AB8F177
Note: Use Standalone MOBS if using Frans or OMOBS if using FCOM/OOO. Both versions can be found here: http://www.tesnexus.com/downloads/file.php?id=28537
Note: Recommend installing UOP Supplemental for additional fixes: http://www.tesnexus.com/downloads/file.php?id=27710
Bash Tag suggestion(s): {{BASH: Actors.ACBS, Actors.AIData, Actors.AIPackages, Actors.CombatStyle, Actors.DeathItem, Actors.Stats, C.Climate, C.Light, C.Music, C.Name, C.Owner, Creatures.Blood, Delev, Factions, Invent, NPC.Class, Names, Relations, Relev, Scripts, Stats}} and remove [C.Water] tag(s) (only exist in older version).
UOP Vampire Aging & Face Fix.espVersion 1.0.0Checksum: A2DBC5A4
Note: Recommend removing if using Wrye Bash. A tweak for this exists in "Tweak Settings".
Oblivion Citadel Door Fix.espChecksum: 1B694D9
DLCShiveringIsles.espChecksum: 2BB84977
Note: If using the russian GOTY edition, move this plugin before 'Unoffical Oblivion Patch.esp' to allow the UOP to make its quest fixes.
Unofficial Shivering Isles Patch.espVersion 1.4.4Checksum: F6C1D21D
Note: Use Standalone MOBS if using Frans or OMOBS if using FCOM/OOO. Both versions can be found here: http://www.tesnexus.com/downloads/file.php?id=28537
Bash Tag suggestion(s): {{BASH: Actors.ACBS, Actors.AIData, Actors.AIPackages, Actors.DeathItem, Actors.Stats, C.Climate, C.Light, C.Name, C.Owner, Delev, Factions, Invent, Names, Relev, Scripts, Stats, Relations}}
Spell Delete And Item Remove.espVersion 4.0Checksum: C5E5A0CE
DLCHorseArmor.espChecksum: BAD48E5D
Bash Tag suggestion(s): {{BASH: Scripts}}
Contains dirty edits: 3 ITM, 0 UDR records. Needs TES4Edit cleaning: http://cs.elderscrolls.com/constwiki/index.php/TES4Edit_Cleaning_Guide
DLCHorseArmor - Unofficial Patch.espVersion 1.0.6Checksum: F74B09
Bash Tag suggestion(s): {{BASH: C.Owner}}
DLCOrrery.espChecksum: 5BC59DB4
Bash Tag suggestion(s): {{BASH: Actors.AIPackages}}
Contains dirty edits: 11 ITM, 2 UDR records. Needs TES4Edit cleaning: http://cs.elderscrolls.com/constwiki/index.php/TES4Edit_Cleaning_Guide
DLCOrrery - Unofficial Patch.espVersion 1.0.4Checksum: 9AA76E38
DLCVileLair.espChecksum: 74D2CA6F
Contains dirty edits: 26 ITM, 1 UDR records. Needs TES4Edit cleaning: http://cs.elderscrolls.com/constwiki/index.php/TES4Edit_Cleaning_Guide
Incompatible with: 'Kumiko Manor'
DLCVileLair - Unofficial Patch.espVersion 1.0.7Checksum: 5B9FF91B
Bash Tag suggestion(s): {{BASH: Graphics}}
DLCMehrunesRazor.espChecksum: CB413740
Contains dirty edits: 21 ITM, 15 UDR records. Needs TES4Edit cleaning: http://cs.elderscrolls.com/constwiki/index.php/TES4Edit_Cleaning_Guide
DLCMehrunesRazor - Unofficial Patch.espVersion 1.0.5Checksum: FF57D0F8
Bash Tag suggestion(s): {{BASH: Delev, Invent, Relev}}
DLCSpellTomes.espChecksum: 312156F8
Bash Tag suggestion(s): {{BASH: Relev}}
Contains dirty edits: 40 ITM, 0 UDR records. Needs TES4Edit cleaning: http://cs.elderscrolls.com/constwiki/index.php/TES4Edit_Cleaning_Guide
DLCSpellTomes - Unofficial Patch.espVersion 1.0.1Checksum: 8CC91BA1
Incompatible with: 'CDM-CGO Compatibility plugins'.
Darkgreen Glass Armour.espChecksum: EEDEAC86
Bash Tag suggestion(s): {{BASH: Graphics}}
Weapon Expansion Pack for Oblivion Nthusiasts.espVersion 1.03Checksum: 13F4CF76
Bash Tag suggestion(s): {{BASH: Delev, Graphics, Invent, Names, Relev, Scripts, Stats}}
Incompatible with: Mithril and Orcish Weapon Sets v1 and v2, Fine Weapons, Rusty Items
Contains dirty edits: 1 ITM, 0 UDR records. Needs TES4Edit cleaning: http://cs.elderscrolls.com/constwiki/index.php/TES4Edit_Cleaning_Guide
DLCThievesDen.espChecksum: 5DB8CCC
Bash Tag suggestion(s): {{BASH: C.Name, C.Light, Actors.ACBS, Actors.AIPackages, Actors.Stats}}
Contains dirty edits: 5 ITM, 135 UDR records. Needs TES4Edit cleaning: http://cs.elderscrolls.com/constwiki/index.php/TES4Edit_Cleaning_Guide
DLCThievesDen - Unofficial Patch.espVersion 1.0.10Checksum: 401934BE
Bash Tag suggestion(s): {{BASH: Actors.ACBS, Actors.AIData, Actors.Stats, C.Light, C.Music, C.Name, Delev, Relev}}
DLCThievesDen - Unofficial Patch - SSSB.espVersion 1.0.4Checksum: 9AABAC21
Note: Obsolete. Upgrade to UOP Supplementals 3.3.4 or higher. Then delete this file and rebuild the bashed patch.
DLCBattlehornCastle.espChecksum: 7048C609
Contains dirty edits: 13 ITM, 74 UDR records. Needs TES4Edit cleaning: http://cs.elderscrolls.com/constwiki/index.php/TES4Edit_Cleaning_Guide
DLCBattlehornCastle - Unofficial Patch.espVersion 1.0.6Checksum: AB4DE79A
Contains dirty edits: 5 ITM, 0 UDR records. Needs TES4Edit cleaning: http://cs.elderscrolls.com/constwiki/index.php/TES4Edit_Cleaning_Guide
DLCFrostcrag.espChecksum: 2A7665FB
Bash Tag suggestion(s): {{BASH: C.Name, C.Owner, Factions}}
Contains dirty edits: 73 ITM, 94 UDR records. Needs TES4Edit cleaning: http://cs.elderscrolls.com/constwiki/index.php/TES4Edit_Cleaning_Guide
DLCFrostcrag - Unofficial Patch.espVersion 1.0.5Checksum: 5744D6B8
Note: Do not use with Frostcrag Reborn to avoid land tearing.
Bash Tag suggestion(s): {{BASH: Actors.ACBS, C.Name, C.Owner, Creatures.Blood}} and remove [C.Climate, C.Light] tags
Knights.espChecksum: F1F478FA
Bash Tag suggestion(s): {{BASH: Actors.AIPackages, Factions, Relations}}
Contains dirty edits: 121 ITM, 257 UDR records. Needs TES4Edit cleaning: http://cs.elderscrolls.com/constwiki/index.php/TES4Edit_Cleaning_Guide
Knights - Unofficial Patch.espVersion 1.1.2Checksum: 2F15B12C
Bash Tag suggestion(s): {{BASH: Actors.ACBS, Actors.AIPackages, Factions, Relations}}
moremerchantmoneyv1.1.espChecksum: 395C0F7E
EnchantmentRestore.espChecksum: 5AABC7AA
EnchantmentRestore_Wells.espChecksum: 8E546E2C
RenGuardOverhaul.espChecksum: 6FFE50F4
Bash Tag suggestion(s): {{BASH: Actors.AIData}}
ActorValueUncapper_Example.espChecksum: 1B99E3BA
JCN_AV Uncap.espVersion 1.01Checksum: 282078EA
All+5AttributeModifiers.espChecksum: ACB0A189
?Unrecognised Plugins
Reorder these by hand using your favourite mod ordering utility.

No unrecognised plugins.
Execution Complete


Why does it say I need TS4Edit for the dirty edits if those files are the most recent ones I can find on TESNexus?

Because it isn't about how recent they are. Notice that they don't say "this mod needs updating' (it only ever says that if there are known problems with older versions, or new versions have different names), but rather that the mod is "dirty" - contains dirty edits that should be cleaned out using TES4Edit. Clean mods tend to result in less compatibility problems etc.

By the way; the "dirtiness" is a typical result of using the Construction Set, which adds them in and/or fails to make some changes in a sufficiently clean fashion, not really a mistake made by the authors or anything. Optimally of course the authors should do the TES4Edit cleaning themselves before release - there are some that do, but many that don't.

You may note there that even the official DLC mods, from Bethesda themselves, are all dirty!

Here's one link to a cleaning guide (it is actually pretty simple): http://cs.elderscrolls.com/constwiki/index.php/TES4Edit_Cleaning_Guide#Section_.232:_Actual_Cleaning_Instructions