I remember http://www.youtube.com/user/teamudf had this issue. It was because of a mod. I forget which one, but it might have been http://oblivion.nexusmods.com/mods/17479//?, or possibly http://oblivion.nexusmods.com/mods/15251//?, are you using either of those?
No, I am not using either of those. Here is my load order:
Active Mod Files:
00 Oblivion.esm01 All Natural Base.esm [Version 1.34]02 Cobl Main.esm [Version 1.72]03 Open Cities Resources.esm [Version 4.1.4]04 Armamentarium.esm [Version 1.35]05 Hemingweys Capes Improved.esm [Version 3.0b]06 Fundament.esm [Version ision]07 Unofficial Oblivion Patch.esp [Version 3.4.4]08 UOPS Additional Changes.esp09 DLCShiveringIsles.esp0A Unofficial Shivering Isles Patch.esp [Version 1.5.2]++ USIPS Additional Changes.esp0B SM Plugin Refurbish - SI.esp [Version 1.30]0C LoadingScreens.esp0D Natural_Habitat_by_Max_Tael.esp0E All Natural.esp [Version 1.34]0F All Natural - SI.esp [Version 1.34]10 Immersive Interiors.esp [Version 0.8.1]11 Realistic Water.esp12 Better Bell Sounds.esp++ Symphony of Violence.esp13 WindowLightingSystem.esp14 AliveWaters.esp15 Ayleid Loot EXtension.esp16 Book Jackets Oblivion.esp17 ChaseCameraMod.esp18 ClocksOfCyrodiil_BC_OBC_OC_OCLR_Vanilla.esp19 Days&Months.esp1A Hot Coffee and Tea-Base.esp1B Camping.esp1C PTFallingStars.esp1D BookTrackerOBSE.esp1E Display Stats.esp [Version 2.0.1]1F DropLitTorchOBSE.esp [Version 2.4]20 Enhanced Seasons.esp [Version 1.3.2]21 FormID Finder4.esp22 Get Wet - just droplets.esp23 kuerteeCleanUp.esp24 MigMiscellanea.esp [Version 1.5]25 Quest Log Manager.esp [Version 1.3.2]26 Streamline 3.1.esp27 Dynamic Map.esp [Version 2.1.1]28 Map Marker Overhaul.esp [Version 3.9.3]29 Map Marker Overhaul - SI additions.esp [Version 3.9.3]2A Enhanced Hotkeys.esp [Version 2.3.1]2B DLCOrrery.esp2C DLCOrrery - Unofficial Patch.esp [Version 1.0.5]2D SM Plugin Refurbish - Orrery.esp [Version 1.11]2E DLCMehrunesRazor.esp2F DLCMehrunesRazor - Unofficial Patch.esp [Version 1.0.6]30 SM Plugin Refurbish - MehrunesRazor.esp [Version 1.30]31 DLCSpellTomes.esp++ DLCSpellTomes - Unofficial Patch.esp [Version 1.0.1]** Book Jackets DLC.esp** EVE_StockEquipmentReplacer.esp32 PTArtifacts.esp** Armamentium female.esp33 Slof's Horses Base.esp34 DLCThievesDen.esp35 DLCThievesDen - Unofficial Patch.esp [Version 1.0.11]36 SM Plugin Refurbish - ThievesDen.esp [Version 1.30]37 Cobl Glue.esp [Version 1.72]38 OCR+COBL Luggage Patch.esp39 Cobl Si.esp [Version 1.63]++ Cobl Tweaks.esp [Version 1.44]3A Alluring Potion Bottles v3.esp3B Hemingweys Capes Improved.esp [Version 3.0b]++ ArmamentariumLL.esp [Version 1.35]++ ArmamentariumLLMagic.esp [Version 1.35]++ ArmamentariumLLArmaVendor.esp [Version 1.35]3C TIE.esp [Version 1.49]3D Better Dark Brotherhood Sanctuary.esp [Version 3.21]3E BrotherhoodRenewed.esp [Version 1.1.2]3F LetThePeopleDrink.esp [Version 2.6]40 Temple District Repaired.esp [Version 1.0]41 The Ayleid Steps.esp [Version 3.6]42 VHBloodlines 1.2.esp [Version 1.5.6]43 Cyrodiil Travel Services.esp [Version 3.0.5]44 DLCFrostcrag.esp45 DLCFrostcrag - Unofficial Patch.esp [Version 1.0.8]46 OCOD+FrostcragSpire Patch.esp47 SM Plugin Refurbish - Frostcrag.esp [Version 1.2]48 BrumaGuildReconstructed.esp [Version 1.0.1]49 Knights.esp** Knights - Book Jackets.esp4A Knights - Unofficial Patch.esp [Version 1.1.3]++ SM Plugin Refurbish - Knights.esp [Version 1.06]4B OCC-KOTN-Patch.esp [Version 3.0]4C ReclaimSancreTor.esp [Version 1.0.5]4D Roads of Cyrodiil.esp [Version 1.0]++ ROC+Hemingweys Capes Addon.esp4E Faregyl.esp [Version 2.0.10]4F Feldscar.esp [Version 1.0.13]50 Gottshaw Village.esp [Version 1.0.1]51 Molapi.esp [Version 1.0.1]52 Reedstand.esp [Version 1.0.4]53 Urasek.esp [Version 1.0.4]54 Vergayun.esp [Version 2.0.2]55 xuldarkforest.esp [Version 1.0.5]56 xulStendarrValley.esp [Version 1.2.2]57 xulTheHeath.esp58 xulEntiusGorge.esp [Version 1.2.1]59 xulFallenleafEverglade.esp [Version 1.3.1]5A xulColovianHighlands_EV.esp [Version 1.2.2]5B xulChorrolHinterland.esp [Version 1.2.3]5C xulBeachesOfCyrodiilLostCoast.esp [Version 1.6.5]5D xulBravilBarrowfields.esp [Version 1.3.5]5E xulLushWoodlands.esp [Version 1.3.3]5F xulAncientYews.esp [Version 1.4.4]60 xulAncientRedwoods.esp [Version 1.6]61 ROC+Ancient Redwoods.esp [Version 1.0]62 xulCloudtopMountains.esp [Version 1.0.3]63 RST+Cloudtop Mountains.esp [Version 1.1]64 xulArriusCreek.esp [Version 1.1.4]65 xulPatch_AY_AC.esp [Version 1.1]66 xulRollingHills_EV.esp [Version 1.3.3]67 xulPantherRiver.esp68 xulRiverEthe.esp [Version 1.0.2]69 xulBrenaRiverRavine.esp [Version 1.1.1]6A xulImperialIsle.esp [Version 1.6.8]6B xulBlackwoodForest.esp [Version 1.1.1]6C xulCheydinhalFalls.esp [Version 1.0.1]6D xulAspenWood.esp [Version 1.0.3]6E xulSkingradOutskirts.esp [Version 1.0.2]6F RST+Skingrad Outskirts.esp [Version 1.1]70 ROC+RST+Skingrad Outskirts.esp [Version 1.0]71 xulSnowdale.esp [Version 1.0.5]72 Feldscar+Snowdale Patch.esp [Version 1.0.2]73 xulCliffsOfAnvil.esp [Version 1.12]74 RST+Cliffs of Anvil.esp [Version 1.1]75 xulSilverfishRiverValley.esp [Version 1.0.4]76 xulJerallGlacier.esp [Version 1.0.2]77 xulTheEasternPeaks.esp [Version 1.1.1]78 Frostcrag Village.esp [Version 1.0.7]79 Sutch Village.esp [Version 1.0.3]7A LostCoast + SutchVillage Patch.esp [Version 1.0]7B Open Cities New Sheoth.esp [Version 2.0]7C Open Cities Outer Districts.esp [Version 4.1.4]7D Open Cities Reborn.esp [Version 1.1.5]7E OCR+ULCH Patch.esp [Version 1.0.3]++ OCC-COBL-Wells.esp7F ROC+UL-II+OCOD Patch.esp [Version 1.0]80 OCR+ULBWForest Patch.esp [Version 1.0.2]81 RST+OCR Patch.esp [Version 1.1]82 RST+Cheydinhal Falls.esp [Version 1.1]83 OCR+Cheydinhal Falls Patch.esp [Version 1.1]84 OCR+ULSkingradOutskirts Patch.esp [Version 2.0]85 Harvest [Flora].esp [Version 3.0.0]++ Harvest [Flora] - Shivering Isles.esp [Version 3.0.0]86 Harvest [Flora] - DLCFrostcrag.esp [Version 3.0.0]87 Auto Update Leveled Items And Spells.esp [Version 1.2.5]++ DaedricRequirements.esp88 HUD Status Bars.esp [Version 5.3.2]89 MinotaurHeadButt.esp [Version 1.3]8A Enhanced Vegetation [125%].esp8B Skill Perk Descriptions.esp [Version 1.1]8C Soulgem Magic.esp [Version 2.0]8D Toggleable Quantity Prompt.esp [Version 3.1.1]8E Alternative Beginnings.esp [Version 1.4.1]8F SM Encumbrance and Fatigue.esp [Version 2.6]90 Basic Primary Needs.esp [Version 6.2.1]91 Ashes to Ashes.esp [Version 1.0]92 Syc_AtHomeAlchemy_No_Bounty_v2.esp93 Lightweight Potions.esp [Version 1.1]94 MigLockpicking.esp [Version 1.8]95 SM Bounty.esp [Version 1.22c]96 kuerteeCrimeHasWitnesses.esp97 Enhanced Grabbing.esp [Version 0.5]98 Phitt's Phighting Phixes.esp99 Bundlement.esp [Version ision]9A nGCD.esp9B nGCD Oghma Infinium.esp9C The Versatile Adventurer.esp** Cava Obscura - Cyrodiil.esp** Cava Obscura - SI.esp** Cava Obscura - Filter Patch For Mods.esp++ Item interchange - Extraction.esp [Version 0.76]++ Item interchange - Placement.esp [Version 0.76]++ Item interchange - Placement for Frostcrag.esp [Version 0.76]** [GFX]_Initial_Glow-self.esp++ kuerteeEffectDrainShaderInitialGlowOnly.esp** ROC - OCReborn Road Record.esp++ Cobl Filter Late MERGE ONLY.esp [Version 1.53]** All Natural - Indoor Weather Filter For Mods.esp [Version 1.34]** TIE Weapon + Armor Filter.esp9D Bashed Patch, 0.esp9E DB_NightMotherMoney1k.esp
None of those stick out to me as a cause for this, but then I'm not using many of the mods you are. I suppose you could use the console to remove yourself from the http://www.uesp.net/wiki/Oblivion:Factions_U#Undead, assuming that is the cause, it was for Teamudf if I remember correctly. But I'm not sure how exactly, I've never done it myself, and its been years since I saw Teamudf do it. I suppose I can look for which video it was, though really it would be best if someone with more experience than I helps you, like I said I don't use most of the mods you do and haven't tried to remove myself from a faction via console before, and I can't say for certain that would solve the problem anyway.
Still it can't hurt for me to try and find the video, I'll get back to you if I do manage to do so.
That didn't take nearly as long as I thought it would, here is the video where he deals with the issue http://www.youtube.com/watch?v=g5_oQ00sd2s&list=PL2Nhq-fpVvDvOh7STjYOtiqdOwsEp2mJl&index=2 . Also he used http://oblivion.nexusmods.com/mods/16704//? to see which factions he was in, you might want consider using that or another mod which does the same.
Well, that was the issue. I was somehow part of the Necromancer faction. Not sure how that happened but I was able to unjoin the faction via the console. Thanks, Zetman.