I have downloaded a game and its size is 4.37 GB. Somehow the download percentage went wayy ahead of where its supposed to be and now Bittorrent is showing the downloading is finished at 2.02 GB ! It has stopped downloading now its seeding !
did you perhaps, deselect any of the files in the torrent properties? it happens often, but for assurance, give the torrent another go, and start from beginning