I think to have the same issue; both proximity switches works fine but I suppose that to active the first lock and so on for the second and the MB, with this option enabled, you have to complete a loop orbit to. I dont understand why the machine dont active locks only after the center loop rollover if you dont complete an orbit like with this option as defaut (off). This should be a feature usefull to avoid that our beards will grow spendig time every shot while waiting balls coming from jets' area, not to make quite fristrating in game play the MB's game lock feature. Am I missing something? :-\