I find the auto selection very frustrating too. It was the same in my other car so looks like the car designers set them up that way. These 'features' should be user definable so you can configure the way you want them to operate not the way a designer thinks everyone wants it to be. If you change outside air to recirculate, it turns the air con on... If I want it on, I'll turn it on myself. Very annoying.
Dex