Apple Music Problem

I don’t know if any of this is happening to other people, but recently, when I add songs to my custom-made playlist on Apple Music, it also adds that song to my library.I have researched about this problem and it told me to go to settings and turn off the add to playlist button. I have done that multiple times and after I add another song, it continues to add it to my library. Along with switching the button back on, how do I fix this?