That's what is says when you already have the quest. The egg above his head is half cracked, meaning you already have a quest from him. You sure its not that one?
__________________
World of Warcraft
Realm-Arathor
80-Night Elf Priest-Nezarn
->Check my Progress<-
That's weird. Maybe its a new glitch. That message you got from that NPC is the message you get when you already have that quest and you talk to him again without having it competed. I have no idea. When I did that quest it worked.
__________________
World of Warcraft
Realm-Arathor
80-Night Elf Priest-Nezarn
->Check my Progress<-