Christmas Playlist Not Playig In Order

WHAT IS THIS AND HOW Do I GET RID OF IT?

This time of year I play my music list of Christmas songs. Rcently this box appeared and I've just been selecting "Play Song" to hear my songs. But, I just noticed that my songs are not paying in their numbered order like I want them to. So what do I do? I am affraid to select "Clear Songs" because I worry that I will lose my Christmas playlist.

Mark