More about the quest you can found in elder scrolls wikia. I don't know why, but I can't post a link into this thread.

The point is that none of my quest objectives had been marked as met in my log!!! The quest itself was listed in the "done" cue in greyed-out letters... but all 3 of the objectives were unmarked as if I'd not completed them (although this was impossible if I had finished the quest as there was no other way to complete it).

Aside from losing credit in my event tally in my stats, this is not a big deal...

So this is a bug, yes? I suggest it shoud be fixed... :/

P.S. No modifications were installed