#1 - March 28, 2013, 10:05 p.m.
Only got Dungeon master just before the patch on the 26th. Managed to get the first 5 dungeons done for Dungeon Hobby Explorer but it now appears to be capped out at the 5 dungeons/ 5 AP. I have done several dungeons since and nothing seems to get it to reset so I can repeat the achievement.
I know the achievement was recently changed to have a cap of 200 AP, but it seems to be capping out at 5 AP for me.
