Unfortunately, cable networking isn't as simple as satellite or terrestrial TV. Most of the cable network area is connected to a different network Headend. Customers may not be able to see local news programmes on a device or on TV. This is a throwback from the original construction of the network, which was not very well thought out by the then cable authority.
If you are able to get the right news on your TV but not on Tv Go, Then this can also be dependent on the region that your IP address is recognised at.
Hope that explains things okay.