Wrong NBC channel being streamed

I live in the area of Salt Lake City, UT and suddenly today I am getting the NBC channel in Columbia, Missouri on the Xfinity Stream app on my FireTV. I haven't made any changes to my internet or app setup and my IP address shows a location of Salt Lake City. When I click on Browse to see the available channels, it is correct and shows the lineup for the local NBC station. But then when you click to watch that channel the show that is currently on the NBC station for Columbia, Missouri comes up. HELP!