On my assassin, I had ended up banishing Koth for his betrayal. (mainly just to do something different.) For some reason, when you guys brought out that little story tidbit, Koth has returned. Upon looking at his story in the companion tab, his story had been erased an was left off to where he flew off with the Gravestone. I have reported this bug twice via-in game. But, it seems that it has fallen on deaf ears and blind eyes. I'd love to play my assassin but, I want Koth gone!! If I had known it was going to be this much trouble banishing him, I would have just killed his ***.