I'm trying to set up a C5400 and I could not connect to any of the 2 5G networks. I put them on different channels and also had to change channel width. This makes it possible to connect to both networks. However, one network warns saying connection password is not secure and when I'm connected, there is no internet. The other 5G connection works fine, but for some reason, it creates 2 different names. For example, I named it "wifi_5g", but it appears as "wifi_5g 1" and "wifi_5g 2". How can I set up everything properly? Only the "2" works. 

My current settings:

2.4ghz Channel width: Auto Channel: Auto

5ghz-1 Channel width: 40mhz Channel: 64

5ghz-2 Channel width: Auto Channel: 100