My '06 F150 seems to be having some issues with the heat controls.
Lately when I turn the heat on the ac button lights up and I have to hit it to turn if off. It doesnt happen every time but often enough to notice it.

Also there seems to be a bit of heat coming out of the center vents when I have it set on floor only.

Sometimes the ac light will come on after hitting a bump and sometimes the heat will start blowing out of the center vents after hitting a bump despite being set on the floor setting.

My setup is similar to this:


What seems to be the cause of the issues Im having?