I have had many autos in the past with adjustable headrest. I am struck by my 2014 CX-5 GT, as frequently I discover the headrest moving somehow by itself higher than the lowest setting. I am wondering how does this happen. My head doesn't rest on it and the opening and closing of the door doesn't seem to move it. Anyone know how this happen or is this a quirk of my particular auto not found on other CX-5? It has me stumped! Is it supposed to do this?