Hi, I have a problem with my RT-AC66U that I cannot seem to find anyone else having. The symptom as seen from the Wifi client software (Android Galaxy Nexus, Lenovo X230) is that the 5GHz SSID continuously varies between 100% signal quality and then suddenly ~40%. The clients rarely manages to connect, and if they do, they are tossed out quickly. When I run `iwlist wlan1 scanning` on my computer, something strange happens: My 5GHz SSID appears twice; On the channel I set in the settings: 100% signal quality On channel 52: ~40% signal quality I`ve tried with with all channel bandwidths, same problem for all. The 2.4GHz SSID/network works flawlessly, from multiple tested clients. The distance to the AP is two meters in clear sight, and the clients does not move. I have upgraded to firmware 18.104.22.168.260, but the problem has been around since I bought it a couple of weeks ago. Does anyone have a clue about what is causing the "extra network"? Because it really seems that this is the cause of my problems.