My wife and daughter drove our Model S from North Carolina to Maine, hopping from supercharger to supercharger. The gps directed them to one in Glen Allen, VA and they followed the car's directions to it. However, there was no supercharger at this location; the guy in the garage at those coordinates told them that this happens from time to time. The supercharger was 6 miles away which they found using their iPads. Same problem in Newburg, NY. Anyone know why?