Music Top - CD incomplete

The contents of the CD, however, disappointed me. On the CD 15 tracks are included.
When MP3 downloads via online shops you get 19 tracks. This is not for me to understand, because the CD is often even more expensive, as a download.
However, I would not give up the quality of a CD and had therefore decided to download.
Had I but seen in advance that the download contains more tracks, I would certainly have been thinking this.