Guide issues and questions

I have tried IPTVX and UHF on my AppleTV against the same source. They get the same EPG data, and yet the results are different. I have on channel on IPTVX that is called something totally different on UHF, so I have to hunt for it. Some channels are totally mislabeled. I'm not sure how to fix that.

Is it possible to rename channels and remap them? Are there better EPG's I should use?