[U2Lynne]

When you hop on a torrent, it always downloads 'chunks' of data. Usually a song is made up of several chunks of data. Very often though, a chunk will span two songs, thus when you only want one song, it will have to download a little bit of the end of another song and a little bit of the beginning of another song. However, that should not take a long time since these chunks are usually pretty small. This is just general information about how a song is downloaded though and not specific to uTorrent. I can't comment on the specifics of uTorrent because I don't use it, I use Azureus.