You have self-organizing network enabled. That might be part of the issue with Wi-Fi, oddly enough, that's why you can't see a second SSID. That's assuming the problem isn't congestion or interference, though they most likely are.
You can disable SON if you access your routers' portal (192.168.1.1. or router website suggested by AT&T) or by calling your provider. Worth trying.
Is the issue with Wi-Fi happening even if you are close to the router, btw?
My switch is literally sitting on my router. Gets 48Mbps. That is about 8 higher than it usually gets.
I'll look into the Self-organizing network. There are several things that should be 5.0 because of how close they are to the routers, and others 2.4 due to distance.
My issue isn't that I "need" 1 gig. It is I am paying for that. If I can't get that (their problem, my problem, not possible on wifi etc) then I need to lower the plan.
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