Logitech Z-5500 + Creative Sound Blaster X-Fi XtremeMusic = 5.1 Surround Sound Problems (why?)?

First of all, it might be the movie. But if it does the same thing to other movies than it might be the media player your using to watch the movies. If you really think the program has no problems then you are missing an update for the sound card. If you are up-to-date then there might be some problems.