From reading the manual about climate concierge it seems that it is supposed to work in 4 zones. On my vehicle when I turn on climate concierge, it turns off the rear HVAC system, and if the rear passengers try to select a temperature it turns of climate concierge. Is this system functioning correctly?

 

Under normal circumstances, the concierge would turn off the rear HVAC if there are NO passengers. If there are passengers in the rear and they tried to adjust the temperature, it would override the concierge. So yes it is operating normally.