just in case, do you have smart connect on?
being capped @ 100Mbps ish sounds like it's using 2.4Ghz instead of 5Ghz
if anything, turn off smart connect and set the ssid differently for both 2.4Ghz and 5Ghz to test again. (might also need to reconfigure the mesh too)
Thanks for the reply...
I do not thave smart connect on...
and the channels are named independently
and I am using 5 ghz