Have you deleted the torrent that you had used while uploading on DCT? You are talking abt Video Mix- Meri jaan hai tu.. right?

Steps to be followed:

1) Create a torrent in torrent client
2) Come to DcT upload the torrent and click "submit"
3) Delete the existing torrent from your computer
4) Download the torrent that is there on DcT. Click Open.
5) In your torrent client you should see that the file and next to it in status "Checked 50%..upto 100%"

Lemme knw if you did all these steps