One Door Will Not Lock Using Fob, Door Control OR Manually

I have '13 Tundra Crew Max. My driver side rear door will not lock. If I use the fob or the controls on the front driver or passenger door you will hear the doors lock but then that driver side rear door will immediately unlock. I was thinking actuator is bad. But the odd thing is I cannot manually lock either. The flip switch by the door handle is like almost jammed in the middle so cannot flip to unlock or lock. ANY IDEAS???

Thanks!!!

 

If it is working when you push the button safe to assume the electrical connections are good. I would pull the door panel off and look for restrictions in the linkage. Assuming here, but what if when you push the button and it doesn't fully lock it just automatically undoes it pops back up. The fact you cant lock or unlock it manually makes me lean toward a mechanical issue inside the door with the linkage or something.