Thats Blizz fault, read here:
http://us.battle.net/forums/en/wow/topic/20749738508 and
http://us.battle.net/forums/en/wow/topic/20749668683
They are in quest log but as hidden... so many people report "quest log full" when 22/25. Droping this quest doesnt do anything. We need to wait till they fix this.