I have been doing some more testing and actually the X-men 3 BR when set to the DTS-MA ES 6.1 track, is not producing sound from the front left or the right surround speaker. When I select any other audio format, the proper speakers play sounds, DD 5.1, Dolby stereo, etc.

I also stopped at BB to pick up a couple of BR that have a 6.1 soundtrack.

Disturbia has a DTS-ES 6.1 track and when selected all speakers play sounds.

Top Gun has a DTS-MA 6.1 track and when selected, just like the X3 BR, no sound from the front left and right surround. All other tracks play sound from all speakers.