Carrera de locos

The movie was amusing despite its script but there was one major screwup. At the beginning of the race all of the competitors punched in their start time and took off one at a time. At the end Captain Chaos and Adrienne Barbeau have a footrace to the finish to punch in their times. The only problem is that Adrienne punched in at the beginning of the race at least 2 minutes before Dom Delouise and Burt Reynolds did. Chaos still had at least 2 minutes to punch in at the end and still win the race.... Also while the crowd is joking around at the finish line 3 cars pull up and screech to a halt; Jackie Chan's car, a taxi and Roger Moore's car. But Moore was standing in the crowd joking around. Who drove up in his car?