This is the same issue I had yesterday as well.
I have one stocking quest for Othalo, but when I tried find two different stockings (one from yesterday, and one today), it tells me that someone else has already taken this stocking... and if so... wouldn't it despawn?
I hopped servers, and was able to pick up another stocking... but not sure why the above is happening...
Edited by Spirit, 20 December 2014 - 01:50.