Driver side elec mirror problem ?

Hi, Recently bought a R/R 4.6 HSE, everything appears to work fine but I have noticed that when you select reverse the drivers side electric mirror tilits upwards on it's own accord? I did enquire and have been told you can disable this function by setting the switches in a certain configuration. I've tried a few but it still does it, most annoying like all minor problems can be.

Can anybody advise on how to stop mirror from moving when reverse is selected.

Regards

SC

its in the owners book or download rave,if i recall they should both dip not rise