Did you let that one guy destroy the staff in the one quest while everyone is asleep?
Nope, I took that staff for myself.
I was kind of annoyed when I did all the quests because I thought that would complete the achievement. That is what the achievement should be, but it is just another reason to play the game again!
Agreed that the achievement should be for the quests, not items. Though I can't say that I want to grind through those quests on a new character for an achievement, I've already put in 68 hours on my guy and if I'm gonna do more stuff, I'm more interested in quests from mods than replaying the basic stuff.
If you're on PC, a workaround would be to find out the item IDs of the objects you're missing and just spawn them.
Wouldn't using the console disable the achievements? I'm on the PC though.
Unfortunately it seems like you're boned because you destroyed the book and returned the key. Rather unfair. Hopefully that's something they'll fix in that major patch next week.
Yeah, lets hope they patch it!