It must be the Quick Power Adjustment.
Yes, but when you click OK again in changes back to 1/2.
There is something strange going on in the cactus with quick power adjust.If i set EV stops to 1/2 and go back it does 1/1. when i go back in the menu it says 1/1 again. when i change it again to 1/2 and go back it is 1/1 again :S