Displaying old SSID

[Earnys10]

Hello, a few months ago I changed my sky hub to two third party ASUS routers. All is well but I've now noticed using a wifi scanner than two old SSIDs are showing up. 1 being for 2.4ghz & 1 5ghz. Weirdly enough the devices mac address are showing as TP link devices, I don't own any form of TP Link boosters or network boosters other than my mesh system which is asus. 1 of the SSIDs is a default sky SSID & the other is a made up one. 

There's no issues with DHCP on the router site. I just noticed that one of the connections has the same number of devices and both SSIDs share the exact same channels as my router. The ASUS routers are operating in full router mode. I've also checked for double NAT and there isn't. 

I'm genuinely so confused does anyone have a fix for this? 

I've tried the following:

Turning off the ONT for 1 hour before setup. 

Resetting the sky TV entirely (people said it's related to the sky q hotspot in another post)

[Chrisee]

@Earnys10 most common cause of still seeing Sky SSIDs are either from Sky Q boxes or you are seeing one of your neighnour's networks.

[Earnys10]

Hello, 

I don't own and Q boxes. However I have reset the sky TVs settings fully and reset its existing network settings. 

[Earnys10]

Still having this issue I've verified it's the sky glass. Turning off all the devices and turning this on shows the old SSID running on channel 9... really driving me nuts