I have a prodigy advance system. When I turn it on there are always three locos already entered (not the ones from my last operating session ) with speeds already set. If you recall that loco it wants to take off spinning its wheels. If you delete them they are back next time you turn the unit on. I have unplugged the unit and tried everything but they still appear every time I turn the unit on. Any suggestions to get rid or these? Thanks Colin