MichaelS,
I tried the procedure you listed. When I backed up the "triangle" remained pointing forward, towards the nose of the car (didn't flip towards the direction of travel) throughout the movement. I park in a multi-story garage and the floor I was parked on was empty so backed all the way to the ramp that connects to the lower floor. The navigation showed my progress paralleling the street below, even showing the slight turn as I started into the ramp.
Disclosure: The raised concrete curbing and pillars caused me to wimp out and not back down the narrow ramp.
I wanted to test to see if there was a discrepancy between where the car's GPS thought it was and what the app showed. Last night I used the onboard navigation to direct me home. The nav stopped at the proper location, Google maps on my Droid showed the proper location. However, the app was showing the address down the street.
I just checked the app prior to posting. My car is at home and depicted on the map exactly where I parked her. Now only the address is incorrect. Progress!!