2016 Ford F-150 body & structure problems

Seat headrest protrudes too much out of the seat and it pushes forward head of some drivers. The only adjustments available (slide up and down, tilt top forward) do nothing to alleviate the issue. The lack of ability to "scoot" the entire headrest backwards causes back and neck pain while driving for as little as 10 minutes. One solution people are resorting to is to re-insert the headrest backwards, but the tilting mechanism prevent the head from being stopped and sent backwards in the event of an accident.

Purchased used 2016 f-150 in oct 2017. Shortly after purchase tailgate would randomly open while vehicle was in motion. Power tailgate would also open when key fob was used to lock vehicle. Tail lights would also illuminate brightly as if brakes were applied when they were not when vehicle was in motion. Other times tail lights would flicker on and off when vehicle was in motion. When computer was scanned no trouble codes were found.