Should get 5 but. .

This is a good app for SWIFTIES so far. . but the only thing that gets on my nerves is I already own the track "I Knew You Were Trouble" but when I click on it to play, it seems like the track never ever be on my iPhone before and when I check my music library, well the track does exist . . Apple please fix this, it is my most favorite song of RED.
Why cant the app notice that this song is on my iPhone too?

Please fix this problem immediately I dont like it. . please!

Alice Belle about Taylor Swift, v5.2.3