The original MGM/Sony disc is PCM 5.1 and Dolby Digital 5.1So here is part of my problem....Thanks @NorthSkyas well.
Looks like Marketing Crap - many of my disks SAY DTS, but once you dig deeper it appears they are not.
This is "Species" for example...and once again @NorthSkypointed out that according to the multiple honest sources, i.e. bluray.com , etc , this disk is Dolby only
Are you sure the PCM isn't there?