Local files won't appear in playlists

[Bademeist3r]

First off, I've got Spotify Premium for over a year now and for albums that I got on CD, but are not on Spotify I would normally make a playlist and download them on my iPhone, which also usually works. However, I want to do a playlist for Jay-Z "The Blueprint", which worked perfectly on my Desktop. The playlist appears on my iPhone as well, but it shows me no songs, even though it says that there are 13 songs in it. The only songs it shows me are three songs, that are included on some compilation albums, which are on Spotify, but not the others.I tried this method with other albums, which worked perfectly fine, but I can't figure out why it won't work this time.

So, how can I download this album on my iPhone?