1. I find that hilarious as well but don't see what's wrong with it. After all, unless he witnessed the theft, he can't get you arrested on circumstantial evidence. Maybe you brought an identical print of the same painting from your Source HQ and some other scrupulous thief stole his?
2. You can manage multiple inventories without switching characters. I like the static windows because it's easier to manage multiple inventories that way. I think this is one of those personal preference things that you either like or tolerate or hope for a mod.
3. With the way bartering works, you should have one char handle monetary transactions in the party and give all gold to him/her.
4. You can't identify in the middle of a transaction with a vendor, so ID things before talking to the vendor. It's working as intended
