OK, so I watched the two side by side and there are extended cuts in that sequence leading up to the part where the door falls on the guy running away and it actually comes back into sync with the TE for a bit before focusing a little bit longer on the girl at the end of the scene. The new 30Hz area where we see the lone red spot is right before the door falling on the guy, and matches some slightly new/different cuts of the dragon flyover.
If you watch the comparison fade in and out, think of the extended bass as the extra scenes they cut in and on top of the TE sequence. It's like they edited in these cuts and forgot that they had used a different HPF on the low end. So where it should be consistent 10-30Hz mild action, it actually will come in and out where they edited in the new bits!
What a mess. Thanks for the report. So just to confirm, the ONLY areas that have extended bass are the additional scenes brought on by the extended addition, correct? ALL the scenes that the two cuts have in common are exactly the same?