When I scan my brand new wifi network (called surferdude8 in screenshot above) which I set up using Deco app ( scanned using BSSID Scan on my iPhone)  I detect two networks which shouldn't be there. They have no known SSID but have a BSSID which is similar to the one that phone connects to when connecting to new Deco out of the box. They are definitely coming from my Deco and not another device. 

have a look at this screen shot

how do I delete the two hotspots with unknown SSID? I'm concerned they are a security vulnerability  X20