I noticed that my public IP adress in the Deco app differs from when I lookup my IP address online. It doesn't make any sense. Also the default gateway is far off. Is my router hacked or is ot normal?

I wonder how I can create a separate 2.4ghz and 5ghz network on the Deco X60. Some devices work better on (and only) 2.4ghz and others on the 5ghz. Before with my Apple router I was able to create a s