Forgot to add, i can sit in the car with all the doors shut and press the door lock button. The boot and the passenger side lock but the drivers side doesnt.
Let me get this straight:
You can still open the driver's door
from the outside, even after pressing the lock button on the remote key, or just from the inside?
If just from the inside, try pressing the lock button twice in rapid succession, as that could activate a double locking feature.
When double locking
isn't activated, you should still be able to open the doors from the inside.
The weird bit however is that when the drivers door is opened it breaks the lock on all the other doors? Is that all that black switch is doing?
Opening the driver's door unlocks all the other doors, is expected behaviour.
I actually found it quite handy, once I got used to it, especially when picking up friends and so on.
The black ajar switch is meant to turn on the courtesy lights, if the switch for it is set to the door sense (usually middle) position.
If the light comes on when opening any of the passenger doors, but not the driver's door, it's either broken, or there's a loose connection to it somewhere.