Ok so one one of the items I liked about the Mazda 6 back up camera despite the resolution being poor and no animated turning radius graphic, was the alert of objects in the field of view while backing up. That being said I park on a garage deck at my office and the garage is an open design. On the second floor when I back up into my stall it picks up vehicles on the street level a good 15 feet below. What the heck is this? I've noticed in certain situations the backup alert will go off when there are no objects behind me, only what the camera may interpret as an object in the field of view. Anyone else having this kind of problem?