Set it up tonight, found 99 channels, although I noticed during the scan it said there could be up to nearly 150. It's very cool, years ago I thought this is what Apple needed to do. A single interface that could integrate antenna and OTT, as well as DVR. I did have a couple of channels that looked like duplicates or something odd, and could not be tuned. Found this in the log, hopefully it will help you figure it out:
2019/07/25 22:11:54 [ERR] Could not start stream for TVE-YouTubeTV ch6206 FS-RSN-FSOH5A: TVE: unimplemented channel
2019/07/25 22:12:13 [ERR] Could not start stream for TVE-YouTubeTV ch6207 FS-RSN-FSOPKY2: TVE: unimplemented channel
The only other thought is a general comment. I noticed when first tuning a channel, there were some instances where the channel appeared and played for a few seconds, and then froze for a bit, before resuming. After that, it seemed ok. This didn't happen every time. Perhaps it just needs to buffer a bit more before starting initial playback?