Deleted playlist songs are playing in ALL of my other playlists.

[chrisaebi]

Suddenly, songs from playlist 1 started playing in playlist 2 when on shuffle. Every 2nd song in playlist 2 was from playlist 1. No idea why. So deleted playlist 1. This had no effect. Songs from playlist 1 still play in playlist 2, and also play in every other playlist as well. **bleep**!!!  When I view each playlist's list of songs, the playlist 1 songs don't show up. Even when I create a new playlist, the same thing happens. I am not on Premium.