You do not say what year/model you have. If its pre face lift Colin JYD is experienced in this model. If new would advise going back to dealer if you think there is a problem. We have facelift model and I frequently unlock the car and open the rear door without opening others. A point, if you unlock the car and do not open a door pretty quickly it will relock. Even if you unlock the car and only open the rear door then close it, it will still relock.If you unlock the car and open a door other than to rear door it will remain unlocked.