@Priesteagle1  with wifi, you can connect to only one router on each device at a single time. In most cases it uses the one with the strongest signal which may or may not be the closest one. Some devices may only connect to the 2.4 band. In your wifi settings you should be able to see all of your wifi names that your computer can see unless the ssid is hidden.

for example, I can see my networks and three or four of other networks of others from my computer. I can only connect to my networks as I do not have the passwords for the others but could if I did.