I have a manual xB. I've had a number of manual tranny cars over the years. I never had a problem with parking them on a slight incline (live in South Jersey where driveways are our only "hills") and rolling back when left in 1st. Parked the xB today on a driveway and it would roll back about 6 inches, stop, roll back another 6 inches, stop, and so on. I relaize that I should prbably use the emergency brake but is this normal?