Blocked partially by chair cushions (damn overstuffed chairs- I want Irwins), also the crossovers are similar, but not the same- the components are different (same values, but from different manufacturers) I'm sure some of that difference is an electrical response difference.
My guess, though, is that the chairs are shading the path of the tweeter-microphone, and that's causing the severe dip. This has shown up all along in this room, and it's a compromise that we're willing to take at the moment (I've had to update/upgrade things as time goes by, the chairs are on the chopping block). I will say this; they are of similar design to the very popular Berklines.
BTW- thanks Carl, I was thinking about that earlier on. Now that I've done it, can I go back to that screen and rename, then bypass taking the measurements all over- or do I have to start from scratch with the channels independently named??