While trying to extend coverage with 2.4Ghz for some external WiFi camera’s, I found it strange that, even with both 2.4Ghz and 5Ghz on High Power, I Got a lot more signal on the 5Ghz band. As you can see in the screenshot below :
Hmm, something that might help to look at is the EIRP for the 2.4GHz band on each AP. Should be able to see that by hovering over the 2.4GHz channel listed next to each AP in the Network tab.
Although that could be a difference due to region. I’m in the United States and I know there will be different power limits depending on where people are located in the world.