rd
this is not an uncommon problem, regardless of patch version.
many battlefield quests suddenly change, are repeated, or are simply unsolvable.
my best suggestion is to just ignore those you can't complete. it only caused frustration or the feeling you've somehow missed something. it's not you.
in act IV i had to finish the game with (IIRC) 4 of the 5 merchant quests unsolved - you'll find out why when you get there.
just have fun doing as much as you can (solving-wise) and don't think about what you can't finish. thankfully, it doesn't matter at all except for a minor XP loss - no effect on game.
