I did the first one Searching for Clues. I then did the second one Saving Santug and received the stocking. I checked my achievements and no checkmark for Searching for Clues. The goblins won't give the first quest now. It seems brokish or at least brokelike. ABCDEFGHIJKLMNOPQRSTUVWXYZ. I now present to you the alphabet. Try not to let your head explode or focus on any particular letter. That would be on you.
If you don't like reading thru links - this is not repeatable quests, it is also a bug in the visual of the /ach. You have the stocking so you will be able to move on once the others go active.