Try downloading "The Sith Lords Restored Content Mod" v1.8 found here:
It's a self extracting .exe so it should automatically install once downloaded (unless you dont want it to).
It fixes MANY, MANY bugs to KotOR 2 and restores all cut content from the game.
While this is maybe not the most likely solution to your situation, I would still try it. It fixed all my bugs, and maybe it can for you too. Hope this helped.