When Collette gets on the train, the camera focuses on a passenger but the view behind her suggests the train doors are open and tucked behind the double-layer glass but the sound effect of the trains movement is continued.
When the car carrying the agents and Collette pulls up underneath an archway to bring her in for questioning, both rear car doors open and both agents and Collette get out. In the next shot, only the right rear car door is open and the agent on the right hand side is open and then Collette and the other agent get out.