Hi Carrerascott,
Simple fix: the profile has to be saved in drive AND reverse.
To do so:
1. Set up your driving profile and save (I assume you already did).
2. Put the car in reverse, set the mirrors tilted down as you want them.
3. Save your profile again.
Done!
When you put the car back to drive, the mirrors will come back to their "up" position.
They should now tilt down when you go back in reverse, if you have the auto-tilt in reverse option set to ON in the settings page.