Yeah, roadmapgps got me to the NJ meet when I discovered (en-route) that the mapsonus route had a big straight line between the NJTP and the destination, with no attempt to actually follow existing roads. There I was, flying down the pike and all of a sudden.. WTF? Fortunately I was able to dead reckon my way there by following roadmapgps lines in the general direction.

BTW, that co-ordinate 'mismatch' appears to be an order or 2 of magnitude error in the zoom level being displayed.