Sometimes all of the tracks from the movie are included in the album, but more often this is not the case; however there are rare cases of songs in the trailers that do not appear in the movie but occur on the soundtrack album.
Sometimes all of the tracks from the movie are included in the album. More often this is not the case. However there are rare cases of songs in the trailers. These rare cases of songs in the trailers do not appear in the movie. These rare cases of songs in the trailers occur on the soundtrack album.