Yesterday I ran a couple of quests with my level 23 monk.
This morning I log on with the monk and see the symbol showing he has unspent AP's. I open up the screen and he has 53 AP's unspent. Yesterday everything was fine (he spent his last AP's when he hit level 20) and this morning I had to reset everything.
Was there an update or reset or something? I've had to do this before at times when I swap a feat with Fred, but I hadn't done anything like that or made any changes to my monk.