Not only that but the power coming from your home electrical outlets (voltage, cleanliness, etc) might be different than that coming from the outlets in the Jersey factory. Didn't you notice how some of the game coils were not set to "factory" from the factory? The settings for the "factory" settings come from the Engineering office in Chicago, while the games are assembled and tested at the factory in Jersey. There is a difference in the power inside each of their buildings, which would mean that there is probably a slight variation from the power in your house.