I've been working on my "Cooking" and everything was smooth till I reached 415 and now I have to buy one of the recipes with "Dalaran Cooking Award" . Seems straightforward and it was till I found out that there should be 5 dailies and I have only one "Convention at the Legerdemain". Is there a reason why I don't have the other four dailies?
As far as I remember the daily quest that is available is random each day and you can only complete one quest at a time.
This. Every daily quest npc in dalaran(cooking, fishing, jewelcrafting) has respectively multiple daily quests, of which it randomly offers only one per day.