4 Zone Climate Question

[Rustyg80]

I just got an 2011 X5 and was wandering if something is wrong with my rear climate controls. If I set temperature for driver and passenger at 60°F and set rear controls to 84°F the rears still blow cold air (maybe slightly warmer than front, but definitely not anywhere near 84°F). I do have the wheels in the back turned to red for heat. Also what I noticed is if I increase the fan speed from the rear controls the front also starts blowing harder. I was under impression that 4 zones means you could set any temperature you want in any of the 4 zones and front and rear fan speeds are completely independent. Is it not working the way it should? Will CPO warranty cover it?

Thanks