My router (Linksys Velop Intelligent Mesh WiFi) seems to always duplicate every channel with a matching unnamed channel. When I use a WiFi tool, I see my channels as expected, but also for each one see a duplicate un-named channel with the same MAC address, channel, speed, and signal strength. In fact, I see the same for most of my neighbors' channels. What are those unnamed channels for. Why does every channel appear twice in my WiFi tool?