I'm playing the game with about 80+ mods installed. In my last game, I reacehd level 26 before starting a new game but using the same mods. In that game, I found a total of three or four grand soul gems, one of which was given to me. Based on past games, I would have expected to start finding at least one grand soul gem when I looted a cave, but that wasn't happening. I'm worried because my current game is starting to look like I'm going to have the same problem. I'm now level 8 and found no soul gems in the last two caves I looted.

How can I determine if there is a leveled list that is affecting my loot or if it's just an issue of RL bad luck?

Here's the list of mods per mlox:
_001_ Morrowind.esm
_002_ Tribunal.esm
_003_ Bloodmoon.esm
_004_ Morrowind Patch v1.6.4.esm
_005_ Better Heads.esm
_006_ Better Heads Tribunal addon.esm
_007_ Better Heads Bloodmoon addon.esm
_008_ Book Rotate.esm
_009_ Less Lore.esp
_010_ LGNPC_NoLore_v0_83.esp
_011_ Lgnpc_SN.esp
_012_ VGreetings.esp
_013_ k_weather.esp
_014_ Unique Banners and Signs.esp
_015_ KS_Julan_Ashlander Companion_1.3.esp
_016_ DB_Attack_Mod.esp
_017_ adamantiumarmor.esp
_018_ EBQ_Artifact.esp
_019_ AtmosphericSoundEffects-3.0-Tribunal.esp
_020_ Windows Glow.esp
_021_ LGNPC_GnaarMok_v1_20.esp
_022_ LGNPC_AldVelothi_v1_20.esp
_023_ Wilderness Sounds T & B.esp
_024_ Less_Generic_Bloodmoon.esp
_025_ LGNPC_MaarGan_v1_20.esp
_026_ abotWindowsGlow.esp
_027_ AreaEffectArrows.esp
_028_ DXM_masterindex_journalfix.esp
_029_ VGreetings-Flee.esp
_030_ Eyren_Robes.esp
_031_ VGreetings-Idle.esp
_032_ TownSounds.esp
_033_ Master Trainers.esp
_034_ VGreetings-Thief.esp
_035_ Better Clothes_v1.1.esp
_036_ Galsiahs Character Development.esp
_037_ GCD StartScript for Trib or Bloodmoon.esp
_038_ LGNPC_HlaOad_v1_32.esp
_039_ New Argonian Bodies - Mature.esp
_040_ New Khajiit Bodies - Mature.esp
_041_ A_flock_of_seagulls.esp
_042_ LGNPC_Aldruhn_v1_20.esp
_043_ abotWhereAreAllBirdsGoing.esp
_044_ Better Bodies.esp
_045_ LGNPC_Aldruhn_v1_20_suppl.esp
_046_ Beds4Rent.esp
_047_ Wyr Jeweler v1.01 c.120.esp
_048_ LGNPC_Pelagiad_v1_30.esp
_049_ LGNPC_TelMora_v1_20.esp
_050_ LGNPC_Khuul_v2_20.esp
_051_ LGNPC_VivecFQ_v2_10.esp
_052_ Less_Generic_Nerevarine.esp
_053_ LGNPC_SecretMasters_v1_30.esp
_054_ LGNPC_IndarysManor_v1_51.esp
_055_ LGNPC_VivecRedoran_v1_50.esp
_056_ Clerical Robes.esp
_057_ Bloated Caves.esp
_058_ Graphic Herbalism.esp
_059_ NX9_Guards_Complete.ESP
_060_ LGNPC_PaxRedoran_v1_20.esp
_061_ LGNPC_SoulSicknessPatch_v1_00.esp
_062_ Windows Glow - Tribunal Eng.esp
_063_ Less_Generic_Tribunal.esp
_064_ NX9_Guard_LGRedoran_Patch.ESP
_065_ NX9_Guard_LGTrib_patch.ESP
_066_ Windows Glow - Raven Rock Eng.esp
_067_ P.R.E. v4.0.esp
_068_ Balmora, Natar's House.esp
_069_ RealSignposts.esp
_070_ shrinetext.esp
_071_ 3S Mannequin.esp
_072_ Book Rotate - Tribunal v5.3.esp
_073_ Starfires NPC Additions ver-1.11.esp
_074_ Book Rotate - Bloodmoon v5.3.esp
_075_ Book Jackets - Morrowind - BookRotate.esp
_076_ Book Jackets - Tribunal - BookRotate.esp
_077_ Book Jackets - Bloodmoon - BookRotate.esp
_078_ More Better Clothes.ESP
_079_ JLH-RicherCreeper.esp
_080_ Little Secrets.ESP
_081_ Unique Jewelry and Accessories_no ench.esp

Thanks,

John

With that many mods, you most definitely should be merging your Leveled Lists.
Wrye Mash creates the most trustworthy one

No mod here immediately grabs my attention as altering random loot, but you should start finding Grand Soulgems at around level 10, so I think you might have a problem by not merging your lists.

(a Merged Objects.esp is also recommended.)