What is causing my sparadic door locking and unlocking problem?

The actuators are what make the locks go up and down , they only do exactly that so since they are going up and down all your actuators should be fine. Sounds to me like there is a crossover connection somewhere in your wiring. Perhaps a frayed wire is making a connection with another frayed wire somewhere in the door controls wiring/seat area. That's my best guess given the craziness you're experiencing. I'd start by checking the connections at the door control and the seat control. Maybe trace them back and see if they meet anywhere.