You guys might already be on top of this, but I thought I’d chime in and show you something that I found was recently added to the HDHR Premium FAQs page. It is basically a list of all the Networks that will be airing the west coast feed even in the east coast. This also might be what’s causing the On Now/Guide discrepancy (assuming they get their guide data from separate sources). Here is the quote:
Premium TV has two airing regions: East coast and West coast. The majority of America will receive the East coast feed. The west coast will receive the West coast feed. For everyone in the west coast, your feed should behave exactly like every other west coast cable provider. The people on the east coast will mostly see the same as other east coast providers, however, USA, FX, SYFY, Paramount Network, TruTV, Comedy Central, Discovery, TLC, Bravo, Animal Planet, MTV, VH1, CMT, Disney, Nickelodeon, and Freeform will all air at at their west coast time slots.
If you are grabbing your own guide data for use with a 3rd party, you will need to choose west coast slots for these channels. Guide data should be correct on the official HDHomeRun apps and any apps that have provided official updates with their own supplied guide data.