Thanks Gonk, that makes sense. I have the newer Anchor Bay release of "Halloween" which includes a DD 5.1, 2.0, and "mono" track which still activates the 2 front channels. Could it be that this DD 2.0 is a stereo mix and the "mono" is the same track played through the 2 front channels? Otherwise I can't imagine why they would include both.

Thanks for the help.