Bug/Problem with the Command Post?

Seems I'm missing the Kerendu, the Rare Scroll Trader. I'm pretty sure I completed the quest a while back, but don't remember exactly how it came out. Only noticed this evening that I was missing It's no longer in my quest log, though, and Kerendu &c don't appear in the Command Post, nor does it seem that I can get it from Dunkoro at the moment. Is there any way to see what quests you've *done*?

Go all the way to the back of the jahai bluffs cave in the CP. He should be there if you've completed the quest.

So he is. I had no idea any of that was back there! Thanks a bunch!