I think I have the hang of it! After following your steps, Channels DVR still shows the incorrect episode number (matching Gracenote), but now the episode name/description match the physical file.
Thanks again (also to AeroR1) for explaining all this.
I don’t plan to put any Channels DVR recordings in my local library (which is centered around Plex), so it’s not an issue for me how it names its recordings.
I wonder if they could continue using Gracenote for recordings, but switch to TVDB for local content import (just for the episode name/description, and Gracenote for the 4:3 art). Although I assume they would have to pay double the db licensing costs. Regardless, I'm not going to hold my breath.
I would have never gone with Gracenote to begin with, I have a personal gripe with them - I had a very early MP3 player (years before the iPod) and I sat down and ripped my 600+ CD collection using MusicMatch Jukebox. As I recall, for about 1/4 of my CDs (all very mainstream) there was no CDDB data yet and I had to manually enter the album/track info, which I knew was getting added to CDDB. When I heard they sold the company for millions, profiting from my unpaid data entry, I was pretty miffed. They should have never gotten away with it. Since then, Gracenote has been bought and sold many times, but I still have a grudge against them.