Navigation system just throws out random streets while driving. Why are we only allowed 2 or 3 "chimes" when we are trying to accept a run? My acceptance percentage is rapidly dropping due to my inability to get to the screen fast enough! Compare my rating over the past 30-60 days and you will see the drop! Also, fix the "speed sensor!" It clocked me at 53 mph while I was at a dead stop. Help!