should the doors be able to open while you are driving ? I do not think they did

When I put the car in gear the doors do lock and then you can just open the door now ! I took the car to the dealer for a oil change and the next day when I picked my grandsons up from school they opened the door while the car was still in drive. I am pretty sure this was not possible before. I have had the car since it was new and am sue I would have noticed this before. Thanks for your help. I am looking for a fix because I haul my grandsons daily..Thanks again Annette

well I sure don't want my young grandsons to fall out I know I can set the door to not open from the inside but I do not want to do that because then they can not open the door in the carpool lane at school drop off.. I used to have to hit the unlock button for them to open the door.