Number of tracks in playlist is different between iPhone and Windows app

[SnijSpotify]

With the Windows Spotify client I have saved a number of albums and of a few albums I only selected certain tracks and I have put them in a playlist.

The client says there are 436 tracks in the playlist.

My iPhone app sees the playlist ans says there are 440 tracks in it.

I have removed the playlist and created a new one, the result is the same.

How do I check what the difference is?

[SnijSpotify]

Found it ...

The greyed out songs count on the iPhone and not in the Windows client, although they never appear.

Even when I remove all tracks from my playlist, the iPhone says there are 4 tracks and when I open it, it's empty.