When Songkong and Jaikoz categorise matched releases as classical or not classical. This allows us to do things slightly differently if a release is classical such as adding the composers name to the release title or settings the principal performers (and not the composer) as the track artist.
But the MusicBrainz database we use do not do the categorisation for us, we have to do it ourselves using a heuristic algorithm. And there are always going to be a few non classical releases incorrectly added as classical just because of the nature of the data added pushes them towards classical.
The not_classical_release.txt file can be used to prevent any release being incorrectly categorised as classical. If you have any such albums please post the MusicBrainz Release Id (and optional album/artist name) and I will add to the not_classical_release.txt file for the next releases of SongKong and Jaikoz.
You can check this quite easily by opening the spreadsheet view in Jaikoz/ or spreadsheet report in SongKong and looking at the Is Classical column and noting if any releases with this field enabled are clearly not classical
Here is one to begin with:
486c04ad-f06d-456f-86fe-9d3e74d2a697:Welcome to the Pleasuredome/Frankie Goes to Hollywood