In the manual, it says that the passenger side mirror will adjust downward when in Reverse, if the mirror adjustment switch is in the driver position. It will not adjust downward, if the mirror adjustment switch is in the passenger position. My problem is it keeps on adjusting downward no matter where the switch is...and I don't like it to do so...being a newb, is there something I am doing incorrectly? Should I bring it to the dealer?