My auto doorlocks operate this way: push on front of switch on door armrest and both doors lock.....push on bottom of switch and passenger door locks (but not driver's door) and then if I push bottom a second time driver side door also locks. Is this normal or is there something out of whack with my doors? I went to get an aftermarket keyless entry and was told my driver door lock motor was faulty or something. Just looking for info/input. Thanks