I had a similar problem, being in the same party as Ebin. I think my journal completed when we talked to the quest NPC upon finishing it, but next time I logged on it was back to telling me to look into it in the journal. I don't know if this is a missing token or something related to the quest, or what have you.
On a similar note, a very similar thing happened to me regarding the were-boars quest. I didn't recieve a quest token preventing me from trying it again, and the journal is not showing as completed after I finished it. :/