Thanks for all the info guys. I haven't rerun increasing the master volume yet, but I did move the mic less than an inch it seemed left or right and it flattened out.....so I think it is some type of cancellation or comb filtering or something that is insignificant and inaudible......but I will do some more measurements and tinkering later on when I'm able.
JVC DLA-X550R projector/GIK Acoustic room treatments
Screen Innovations Black Diamond Zero Edge 1.4 110" 16:9
Marantz AV7702mkii pre-pro/Wyred4Sound 5-channel amp
JTR 3TX LCRs/Single8 HT-LP surrounds/2 RA Gamma21 master/slave pairs