Local Files detected, but not appearing?

[Othynrix]

So, I have searched this up, and I am turning a blank:

In Spotify, I have imported a few local files, which save and run perfectly on my Windows computer. But they're not appearing on my iPod (Basically the iPhone). I created a special playlist for a single local file, and this is where it gets weird. For some reason, it recognizes a song to the '## Songs' subtext below the playlist name. But when I go into the playlist, nothing is there. But when I play music on my computer and it switches to the Spotify remote control thing, it recognizes the song!

I'd really like to listen to local files on my iPod, and I have been worried that Spotify have since removed this feature (local files have disappeared on my iPod!). Any help will be great, thanks!

Oh, also, yes, I have Premium.