Other mistake: Near the beginning of the movie, Milla Jovovich reads a note that has been left on the desk. She didn't write it, as they demonstrate in the film. However, when they do show the person who wrote the note composing it, the handwriting is different from that in the note from the earlier scene.
Other mistake: Why does Rain get out her torch and hold it with her teeth before climbing under the train? It would have been easier to leave it in her pocket until after she climbed down. We also see, when she is working, that it has a device on the end for gripping it properly with your teeth (called a Lite Bite, I believe). Yet earlier she chooses to grip it by the barrel. Try it with a mini Maglite. It's not comfortable.