Hard to remember from memory, but I believe if you hold in the drivers side auto button for a few secs, the passenger side temp display will read the same as the drivers. Adjusting the drivers side will also adjust the passengers.
Adjusting the passenger side will revert it back to dual zone.
If you hold in the passenger side "+" button and the "recirculation" button you can switch between degrees C of F, for the climate control and the outside temp in the DIS....