I'm just assuming the former until they eventually turn up! Could be a bug, though, I mean the guy with Braccus' mace didn't turn up in my last game after I cured the piggies of their fiery misfortune, for instance.
I'm not sure about the tomb. It seems to be a doorway to the cave below: I'm guessing that's what's triggered if you let your characters auto-pathfind there way out of Braccus' lair.
