I have been closing out the game and re-launching it each time to test. I double-checked the project folder, and there were two instances as you mentioned, so I deleted the extraneous ones, but it still isn't showing the changes to the track list.
I had them in two locations: "game" folder and "game/music_room" folder. I tried deleting each set separately, to see if keeping them in one location or the other would work, and neither seemed to update the track list, although both "worked" equally well, for what it's worth.