Time: 1:21 PM GMT+1
World name: Cerberus
Character name: Chappi Rukia
Class/Level: WHM 60
In-game time: 2.21 PM
Steps:

I logged into the game and looked through my achievements as i knew there will be new ones when you obtain a certain amount of minions. Both "Despicable You" Achievements and also the "Follow the Leader I" Achievements are greyed out for me but it says I have the full amount of minions for it. I guess I'm bugged? D;
For a friend of mine it right away worked.