Apple Music is renaming my custom playlists.

I've created a new playlist in Apple Music on my MacBook Air. I can rename this playlist the usual way, by editing the title and hitting enter to save. The weird thing is, when I go to add music to this playlist Apple Music decides that it wants to rename the playlist back to the (original) name. For instance if I started with a single song and created a new playlist, Apple Music would name it "Artist - Song Title". I can then rename the playlist by clicking on it in the side bar, clicking on the name and renaming it to say "Rock Songs I". Then I want to add another song to the playlist. If I drag it or click to add it makes no difference, the program changes the playlist from "Rock Songs I" to "Artist - Song Title". It does it EVERY TIME. As the pirate with the steering wheel fixed to his pants once said ITS DRIVING ME NUTS! Help please. :-)

https://youtu.be/-pUT65aikTU <---- Here's a video of my problem.