Sometimes there are songs originally planned to be included in a film, but are cut at the last minute, even though the soundtrack album includes the song. There are many of Elvis' soundtracks that include songs that say they are from the film, but are not. I have even seen a few of the movie trailers that show Elvis singing part of the song, but the scene is not included in the actual film. This is most likely what happened with the movie "Elf". Maybe Jim's song was supposed to be included in the movie, but ended up on the cutting room floor. Same with "Jingle Bell Rock", although it was listed in the movie's credits...