A mage guild quest that sent me to test a "New spell" didnt give me a necessary item to use.
Another mage guild quest didn't have the quest item in the dugeon, and for some reason after the quest time expired it was succesful anyway and I got the reward
A Dark brotherhood quest wouldnt tell me when I had killed all the thieves necessary and even if it said I would get a reward, there wans't anything.
I think the quick solution is to only install the compusa quests. You can also test everything and delete the buggy quests, since their files are listed but that sounds like a ot of work. Just letting everyone know