Blame the game for user incompetence. I at first thought to that there was an issue, until I played it through, if you do everything you are supposed to these quests will flow properly, Chances are you did something so these quests could not be completed. It is called consequences.
Um....no. If they can't be completed because of "consequences", then you should receive some kind of "quest failed" message, rather than the quest just being stuck there. There's also a ton of people over at the official forums complaining about the same quests. That area is obviously a little buggy.