2007 Yukon XL Rear A/C Vents wrong air flow

[jfornshe]

This one is interesting...i just purchased a 2007 Yukon XL and the back A/C vents blow the opposite of the setting...if you set it to go overhead it comes out the floor and if you set it to the floor it blows out overhead. If you control it from the front on AUTO and set the temp to 60...it blows out the correct vents in the front but wrong in the rear..what's going on!!!

It did have the A/C control panel switch in the dash replaced as the paint came off the buttons..

It's not a show stopper problem but frustrating!

Thanks!
Farmer