2 network names: xfinitywifi and the network I set up

[Dook89]

I set up a new Xfinity xfi gateway and gave the network a personal name and password. I still see another wifi network called xfinitywifi which I can sign into with my Xfinity account information. I have two concerns 1) is my bandwith being split between the two networks, slowing down both? 2) the xfinitywifi network details says it has security: none.
How can I eliminate the xfinitywifi network?

[EG]

The xfinitywifi can be disabled from your online account page.

To turn off the public hotspot, go to

http://customer.comcast.com/help-and-support/internet/disable-xfinity-wifi-home-hotspot

https://www.xfinity.com/support/articles/hide-disable-in-home-wifi

I've seen it mentioned elsewhere that even if that page shows it disabled, sometimes you need to enable it, wait a bit then disable it again to get the public wifi to shut off..