I reported earlier that the nerf script on armor was converting my +5 magic vestment buff to a hard +1 AC bonus on my armor. That seems to have been fixed. But it's now nerfing my Shields. I have a dragon shield, normally +2, but I also had +5 MV buff on it ... well I now have a dragon shield with 2 hard +1 AC bonuses on it!!
Perhaps you could sell an buff remover, not the random one, have it have 5 charges on it so I can fix my gear! Remove it from the shops after a time.