5GHz shows up in both 5 & 2.4GHz

I am by no means tech savvy…so I’m kinda in over my head trying to figure out why I have good signal strength on my WiFi yet very poor performance. Step one was to run InSSIDer. Step two get confused. The visual of InSSIDer is pretty straight forward but when I look at the layout I see the 5GHz showing up in the 2.4GHz box. I also see it in the 5Ghz box. Here’s a pic of what I’m seeing: