how to stop Spotify from adding songs to my playlist

[#1]

I set up specific songs in each of my specific folders and that is all I want in each folder. Spotify keeps adding songs to my playlists in my specific folders, because Spotify thinks that I will like the Spotify-selected songs in my playlists. I DO NOT WANT SPOTIFY TO ADD ANY SONGS TO ANY OF MY PLAYLISTS. How can I stop Spotify from doing this?

[Elkagirl]

We have just created a works playlist and I'm having this trouble it's adding random heavy metal songs from another playlist and it's not the sort of music they want on this playlist it's really doing my head in I just want to add songs that fit and it's adding stuff that don't fit at all