Always happens. they post like they want help but tell them something they don`t want to hear and they shout back in your face. they just want instant mob agreement.
I have never had this problem some seem to have and my game continues running merrily. So maybe I missed a quest, or maybe I didn`t. My game did not stop, it did not break. Point is, there`s plenty more and for all we know any `cancelled` quest could be reset after the 10 or 30 day period.
It is a problem on PC as well, I play on PC and have run into this several times now. Yes, I can look up the console commands to cancel the quest when it breaks like this, to get it out of my quest log, and I've done that. And... yes... Beth could *fix* this so that it doesn't happen anymore, in a patch. Proper quest flagging/resolution when you talk to NPC's, isn't rocket science-
Talk to NPC... NPC gives you quest... NPC sees you've already completed or activated the quest completion criteria... NPC gives you credit for completing quest and rewards you... quest clears from your log. Viola! Not so hard, now is it? If they can't easily fix those kind of botchups when they happen, they need remedial QA training. It may not be the biggest issue in the game that needs fixing, but it definitely should get fixed, as the largest segment of Skyrim players have no remedy when it happens.