synced playlist missing songs

I made a synced playlist of 50 songs for my most streamed songs in the last 30 days, and there are MANY songs lost. Last time I checked, there were 4 or 5 songs that weren't there, but now there are 14. I re-made the playlist many times, erasing the previous one, and it still didn't work. The app tracking is correct, but the problem is only on the playlist.