Ha-ha... those fuckers at Anchor Bay doesn't seem to be able to tell what track is which any longer with all their dickin around with this classic. That films on DVD and BD doesn't contain the original sound mixes have sadly come to be expected these days, it has been the norm for the last 15 years and it sadly seems to be an unwinnable situation, no matter how much complain there has been about this, the studios continue to ignore it. I think they should begin colorize all their black and white catolog titles when they are at it as well.
A minor correction on my previous statement about Anchor Bay's old THX DVD in PAL territories including only a fold-down of the re-mix instead. I only own the reg 1 disc myself but a friend of mine told me the original mono mix was actually present on the PAL disc, but it was incorrectly encoded as a 4.0 Dolby Surround whereas the intended Dolby Surround mix was presented in mono on that disc - they switched places. It still had the 5.1 though but Anchor Bay surely knows how to handle this title with respect. ;) I'm quite sure this have added to the confusion regarding the original audio on several message boards in the past.