Each node has it's own group of seven wireless MAC addresses. I did call support and they found one issue in my LAN that I was unaware of (cabling fail), but initially the agent was surprised at my logging seven MAC addresses for each node, but could not explain why there were so many.

Perhaps these are characteristics of WiFi6. FWIW I am using a WiFi6 capable Android phone as my scanner.

Overall I had a positive experience with support.