Notice something wrong with this picture?
I watched this scene a couple of times, and it wasn't until I made an .avi of the scene that I figured out that it was flipped horiztonally.

If I had to guess why, I would say that this particulat shot was made after the other scenes, and in order to maintain continuity, the editors had to flip the shot to make it fit.

At least that would be my guess....who knows, they simply could have screwed up. :)