My other saves are unaffected by this, as are any new games that I start. The mods I cleaned the GMSTs from were 2 self-made mods that should not affect spells at wall and the Daedric Sorcery mod (allows one to go on a series of quests to summon the Daedra princes and receive quests from them). The 3 mods I installed were Gnisis Bridge, Antares' Big Mod 5, and the MCA patch for it. Using god mode works, but I would rather not spend the game as a boring invincible Nerevarine. Uninstalling the new mods did nothing to fix the problem.
I have never encountered this in my 8 years of playing Morrowind, and a google search does not give promising results. Shall I clean my saves? Panic?