As I understand you can pair up to 5 phones but only one at a time, so if you have two in your pocket both turned on only one will link and it will be pot luck which one it is.
I may be wrong but that is how I understand things.
When you turn on Climate Control the car will try to maintain the temp you set with the right hand control [the one with the Temp on] so if the temp is 20c in the car and you set the control to 18c the air con will cool the car to 18c and maintain it. If you the set the control to 25c the air...