Thanks to a nudge and a small donation from one of the users, I’ve added track grouping and an additional sorting option to the Spotify Playlist Sorter.
Grouping lets you group tracks by artist, album, or release year, and then tracks are sorted within each group according to the “sort by” criteria.
Sorting by album track number
There’s an additional sorting option letting you sort by the album track number. This is useful when grouping by album to preserve the album track order in a playlist.
Additionally, when sorting by release date, album track number is used to resolve “ties”. This means that when tracks have exactly the same release date, they will be sorted by their respective track numbers (not randomly as it was previously).
Check the updated Playlist Sorter for Spotify and spread the word if you find it useful.