Central locking system is starting to fail?

Hello, I have the car listed above, right hand driver. My car's central locking system is starting to malfunction. I use my key to lock and unlock, recently it starting to unlock straight after I lock it, it takes me few attempts to lock it, it's just instant unlocking if I lock it. Then it developed another door issue which is the door light on dashboard start flashing. It's like the door open, the light inside indicating the door is open, I tried to open all doors and shut them again one by one to illuminate which door but no joy. It happens while driving so I assume it's related to the main issue with the central locking, I tried both my keys even replaced batteries, checked the fuse and all fine. Any idea what might be the problem?