lol this is getting confusing, your post made clear what I'm trying to say though, you ONLY CONTROL THE TEMPERATURE OF THE AIR with auto off, with auto on the direction of the air AND fan speed is selected ACCORDING TO TEMPERATURES in different parts of the car.
for example, its a cold day, you turn the heating to 30 degrees, switch auto on, then before you know it air is directed at your feet and out of the dash to ensure the car warms quickly (as heat rises)
on a hot day, you turn temperature down to a chilled 16 degrees and flick auto on, the air flows solely out of the dash to ensure the cabin cools quickly, once the cabin is at/close to the desired temperature the fans will back off
I'm not saying it will add cold air to reduce cabin temperature or up the temperature when its too cold, just that it will alter fan speed and direction
does this make any sense or am I swimming in circles?