Need help with I-Drive system on 2011 X5

[raytor]

This is my first BMW and just got this 2011 X5 and the I-drive display is a bit complex to this first time user. I have a couple of questions.

1) The A/C has a manual temp knob as well as a temp control on the I-drive display and they don't seem to interact - I can set one to hot and the other to cool - which one has precedence - the car is never really comfortable here in the still hot deep south.

2) There are 6 programmable buttons below the CD player. If I set button one to a Nav destination is there a way to also set that button to a radio station or are these buttons just single use - in my previous cars the buttons were multi use but I can't make that work here.

Other than that I am really enjoying the switch from domestic vehicles.