Spotify on laptop and iphone "recognises" local files but will not show up on iphone

[PinTham]

I have four local files on my playlist that will not show up on my iPhone. The local files show up and plays perfectly on my laptop (i'm running a Mac). However, in the same playlist on my phone, the local files do not show up. I separated the four songs into its own playlist and made it an offline playlist.

Spotify on my phone recognises the four local songs, as it shows under the playlist name, "four songs", but when I go into the playlist, there are no songs. 

playlist on my laptopplaylist on my iphoneafter tapping into playlist