Bad episode mapping for That Time I Got Reincarnated as a Slime - Visions of Coleus

[opello]

I thought I had it figured out so I opened this issue thinking it was a mapping problem. They pushed back saying it was a TVDB v2 vs v4 API problem. I'm hope to get some help on what should happen to resolve the problem.

There's detail in that referenced issue, but the basic problem seems to be that the files are scanned correctly, I have an anidb.id file with 17873 in it, but the data from TVDB is "off by one" it seems:

[X]   s0e10 s01e001 anidbid:   17873 air_date: 2023-11-01 abs_number: 0, title: Coleus' Dream, part 2
 - [1] title:   [en] Coleus' Dream, part 2
common.LoadFile() - File cached locally - Filename: 'TheTVDB/json/352408/episode_9684710_ja.json', Age: '0.53 days', Limit: '6 days', url: 'https://api.thetvdb.com/episodes/9684710'
 - [ ] thumb: https://thetvdb.plexapp.com/banners/v4/episode/9684710/screencap/654144fb0b929.jpg
[X]   s0e11 s01e002 anidbid:   17873 air_date: 2023-11-01 abs_number: 0, title: Coleus' Dream, part 3
 - [1] title:   [en] Coleus' Dream, part 3
common.LoadFile() - File cached locally - Filename: 'TheTVDB/json/352408/episode_9684711_ja.json', Age: '0.53 days', Limit: '6 days', url: 'https://api.thetvdb.com/episodes/9684711'
 - [ ] thumb: https://thetvdb.plexapp.com/banners/v4/episode/9684711/screencap/6541452b700a3.jpg
[X]   s0e12 s01e003 anidbid:   17873 air_date: 2023-11-01 abs_number: 0, title:
common.LoadFile() - File cached locally - Filename: 'TheTVDB/json/352408/episode_9754331_ja.json', Age: '0.53 days', Limit: '6 days', url: 'https://api.thetvdb.com/episodes/9754331'
 - [2] title:   [ja] 劇場版 転生したらスライムだった件 紅蓮の絆編
 - [ ] thumb: https://thetvdb.plexapp.com/banners/v4/episode/9754331/screencap/65414583646af.jpg

because part 1 (episode 1) shows up as "part 2" in the log.

I'm just using the default settings I'm pretty sure, so I suppose there's something in there that says "I want the TVDB episode titles" and maybe I'd be happy with the AniDB ones?