Well, you should be hearing it from your center, but not your surrounds (unless it's a scene set in a cave). My best guess would be that you have the wrong surround decoding option selected, one of the funky "music" or "movie" modes that converts 2 channel into 5 channel using simple reverb algorithms.
Double check to make sure that you are on the most basic Dolby or DTS decoding.
Double check to make sure that you are on the most basic Dolby or DTS decoding.