i actually dont know why they do that, a lot of artists do that, sometimes the song 标题 just relates to the song and they cant make it seem to fit into the beat
jack loves 首页 alone and threatened to leave the band if they didnt name the song that. (: so luckily they did, haha. ps: alex 说 that in an interview, so im not sure if jack actually did that, but that should explain.