I posted in your thread you made on tape op with this:
Actually, that is likely due to your test set up. When you do your tests, you want to only use one speaker at a time for them.
Your treatment hasn't seemed to change the frequency response too much - but I bet if you looked at the waterfall graphs you'd see a lot more improvement (I'm sure you can hear a big difference, right?). Oh, and ceiling reflection could be giving you a comb filtered like response as well.
You may want to also trap the rear corners as well. The back wall can be a huge offender in bass response. I would try (just to see) perhaps stacking your two red ones on the front wall in the rear corners. If you can hear a large improvement, go for more traps in the rear corners.
Check out our video we did on REW here, it explains how to properly test and view your results: Room EQ Wizard Tutorial Video