The game has an awful lot of little problems in it--especially Act III--of various sort but like you experienced pointing to either poor beta testing and/or kicking the game out the door at our expense no less to finish beta testing. If you and I had the courage to shelve the game and wait months for Larian to get the feedback from those who don't shelve the game and fix the problems and release another big patch it would go a lot better for us then. Unfortunately diminishing returns may dicatate to Larian that it is done with the game and spending any more on fixing so many little deplorable bugs wouldn't be worth it to their bottom line--something to remember the next time you or I buy another game from Larian.
Even if you use the walkthrough to get you through some quests cleanly, which I did, one of the most irritating and laughable little bugs you might soon discover are several NPCs you talk to who start off with a good deep Raanaaran voice for the basic dialog that suddenly changes to a higher pitch Indian accent.
Good luck.
