Storm ready WiFi

I saw an older thread from two years ago, talking about device connectivity issues while the storm ready is connected. I am currently still having this issue ever since I bought the unit when it’s plugged in and online devices in the home will automatically connect to it like an extender But when that happens, I start to have connectivity issues with some of those devices. Now I wish there was a way to determine what device can connect to that as an extender and what device to ignore it and just use the modem that would help me out in this situation, but for some reason every time I plug it in I have a device that no matter where it’s at in the house wants to connect to that instead of the XB8 and it always has issues the second I try to use it Super annoying and I can’t find a way around it