I think this is a problem that needs to be fixed with a patch
the quest involving Balin and Jonas over Balin's necklace, no matter what is done, ends in failure
When you first talk to Balin he offers you a job, find his necklace. He thinks Jonas has it for various reasons. You can either accept or refuse, but no matter what you do you're given the quest to return the necklace. The info on the quest says go talk to Jonas about it.
When you talk to him, after you have the necklace, he says Balin is a scumbag and you can either offer to kill Balin, or say Balin will make Jonas pay for stealing.
If you offer to kill Balin, and you do so, you receive a failure for the return the necklace quest, but if you talk Jonas afterwards, you get a bunch of EXP and 1 rep point
If you say you're going to tell Balin it was Jonas you get gold
the problem there is that no matter what options you take to help Jonas, you end up failing a quest which I think is unfair
