I've had this issue sense the beginning i think, sense beta. There appears to be a very small amount of time that the action bar is out of sync with the abilities. And the longer your signed in, the more out of sync it will become. Stay signed in for 24 hours? well your 30 second ability will now be 15 seconds, but it wont work until the 30 seconds is up. Its been this way sense the beginning I think. You wont notice it much if you always shut down XIV at the end of the day. But if you stay logged in 24/7 like a lot of us, it becomes easily apparent on a daily basis.