Sonos app importing from Apple Music shows artists out of alphabetical order

Does anyone know why some artists' names appear out of order on the Sonos app? When I use Sonos on my iPhone and use Apple Music as the service, all the artists appear in order apart from maybe one or two per letter, which are shown at the end of that letter. For example, A is all in alphabetical order apart from Aerosmith, which appears at the end of the As. Then Bs are all in order until you get to the end when Beck and Ben Folds Five which are at the end of the Bs, etc. The other thing is does is list all the The bands under T for The, rather than under actual band name. I posted on the Sonos community which was pretty defensive and said 'it's an Apple issue' even though there are no such problems in the Apple Music app. But I wondered if anyone knew what's going on and if there's any way to solve it? Assume there's some metadata somewhere that is missing or incorrect on the artists that are out of sequence.