The search results are returned under three headings: albums, artists and tracks. The results returned under each heading don't seem to be consistent.
E.g. search for 'jazz':
Albums
Albums contains a grid of albums which have album names containing 'jazz', e.g. Jazzmatazz.
Artists
Artists contains a list of artists who have names containing 'jazz', e.g. DJ Jazzy Jeff. Click on the Artist and you see a list of their albums, e.g. Homebase and Summertime. But the list also contains Pat Appleton, Max Mutzke and Xavier Naidoo. Why? I suppose because in an album called Hell's Kitchen by Jazzkantine, there are three tracks which have two Artist tags each; one track has artist = 'Jazzkantine' as well as artist = 'Pat Appleton', another has artist = 'Jazzkantine' as well as artist = 'Max Mutzke', another has artist = 'Jazzkantine' as well as artist = Xavier Naidoo'. Or maybe it's because they are tagged as artists on an album which has an album artist 'Jazzkantine' with 'jazz' in the title, or where each track has a style tag of 'Jazz-Rap'. If I click on Pat Appleton, in her albums list, I see the Hell's Kitchen album (which led to the artist coming up under the 'jazz' search' but I also see her 'What's Next' album, where she is the album artist, and the album doesn't have a single jazz-related tag.
Similarly, under the Jazz search, OutKast, Jazze Pha and Sleepy Brown all appear. It must be because the track Bowtie has an artist tags for each of them. Outkast and Sleepy Brown should not be in the list.
It would be logical (albeit limited) if I saw only artists who have 'jazz' in their names.
Tracks
Tracks shows a list of tracks where (it seems - I can't tell because there's a lot of results, and also the album name is truncated) either the track name, album name or artist name contains 'jazz'. Albums and Artists have already been dealt with in the artists and albums tabs, so I don't think they should appear again in Tracks. Should the track list not contain only those tracks where the track title contains 'jazz'?