I bought my 2008 Mazda 3 Hatchback a couple months ago(used) and later noticed that there were some issues with the door locks. When I press the unlock switch(on driver or passenger door), only the two back doors unlock. When I press the lock switch(on driver or passenger door), only the door behind the driver’s seat locks. I’ve tried researching a bit but it doesn’t seem like an actuator issue and it doesn’t seem like an ECM issue because it’s only the locks on the car, nothing else. Just thought I’d post on here looking for a solution , I just started learning about cars so sorry for incorrect information/incorrect understanding of the issue. Thanks so much!