So, I've been pursuing that Cursed title (the one that you get from doing 1000 quests for Nori and Mori each) for a looong time now. I finished doing 1000 for Mori a while back and literally just finished getting 1000 for Nori. Realized I didn't get the achievement.
Check achievements.
It's retired. WHY. /collapses into a heap of sadness

Um, what? Why would they retire this? I just don't get it.
I'm really sorry. I can imagine that is a HUGE disappointment after all that work. -_-
Pretty sure this was retired because it didn't work correctly and was being awarded to people who it shouldn't be.
Wait what? I've been slowly working towards that for ages and I was starting to do more Mori quests...
I really hope they can bring the ach back.
[edit] Well, this is embarrassing. I knew I didn't have 1,000 quests for Mori done yet but I apparently have the ach. I think I may have gotten it when I reach 2,000 total Cursed quests done but not 1,000 each for Mori and Nori.
Hm. Then the problem with it being awarded to people who shouldn't get it must've been a new one. I got my Cursed title long ago and it worked fine. Had a hard time getting the Quests done for Mori - timezones are bad. xD
this makes sense, especially since it shows me having it when I technically shouldn't.
You probably got it due to the glitch; you can just finish out the requirements, or you can file a ticket to have it taken away, but you'll have to file another one to get it back (after the first time I filed a ticket about titles, and I got it by mistake AGAIN, I just finished the achievement on my own)
I'm pretty sure you can file a ticket to get the forum title c:
If I remember correctly, the achievement was retired when we moved to the new achievement system. Ever since then, it wasn't calculating correctly. There were a couple other achievements that had trouble, but somehow they were all fixed, and this one never was.