The front doors lock by themselves when you open the door from the exterior handle.

Its very frustrating, and now I have to carry my spare key in my pocket so I don't lock myself out. Again. SO when you open either of the front two doors, the button on the top of the door panel where you push to manually lock that door drops, and the door locks. It started as an intermittent problem, and has become increasingly more frequent, until the drivers side does that all the time, and the passenger side almost every time. The driver's side door now doesn't always like to unlock with the key unless you turn the key back and forth a few times and eventually it will open. Its not the lock cylinder, that turns fine. And sometimes you have to push the manual lock button down in order for the door to remain unlocked even when opening it from the inside. Any Ideas?