Game works fine during play, match, attract mode etc., but noticed now if I power off and on again, the match number always comes up '17'. Also the number of credits can change to a way different number than it was before. But other things seem to store okay when turned off/on like the last game score, high score to date etc. I tried clearing every setting using the button on the MPU but no change. Do I need to clear something else some other way? Why would it only goof up some settings and not others?