This article explains why some songs may be missing when you create a soundtrack based on a Spotify playlist.
When you create a soundtrack based on a playlist, we match the songs in your playlist with the content available in our music catalog. All of the songs which we have licensing for are added to your soundtrack along with similar ones to ensure you have plenty to play.
You can always remove songs that you do not want in your soundtrack:
1. Go to your music in the top menu and click on the soundtrack you want to edit.
2. Click on the three dots on the Soundtrack and select edit
3. Remove a song from the playlist by clicking on the X symbol next to it. If you're unsure which song to remove, you can preview it by clicking on the headphones before removing it.
4. Save your changes when you're done.