This is an older thread, but had the same issue with only 30 2.4ghz devices connecting to my XB6. I just got an XB7 and it does NOT have that limimtation. I now have all 36 of my smart devices working on the 2.4ghz band. WHen you request an XB7, see if the rep will send it out via service rep and not in the mail. I had a hard time getting mine shipped.
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