Ultimate Evo Problem

[1976]

Hi guys,i recently bought the Breitling evo ultimate ,(what a cool watch), but i have a problem with the chrono.When you reset the chrono all the chrono hands reset to the place all right,but after a while you see the 12hr counter hand that is still on the run and counts as the chrono in on and the other hands are in place.Could someone tell me what to look for so i can fix this problem and if i would change the movment to a Swiss 7750 will the hands fit the movment.

Sorry for my crapy English, youre help would be most aprisieted.