Linksys E1000 V2 Router: I have two networks and only want 1

[mikecuh]

So about a few weeks ago my internet went out. I restarted my modem and my router and eventually the next day the internet came back. When I first opened my browser, I was prompted to create a Network by a Cisco website if I remember correctly. My old network was called 8921 Canby so that's what I decided to name it. My internet became slow and I realized that there was another network called Cisco55726 which was also my network. Now I have two networks: 8921 Canby and Cisco55726 and I have no idea how to delete one of them. I believe that splitting the router into two networks is slowing down the internet speed. I tried going "192.168.1.1" but there's no options there to get rid of a network. I also couldn't find any other information online so I'm hoping someone here could please help me!! Thank you in advance.