@ngocyen... Hello... Let me guess... you upgraded your torrent client version around 3-4 days ago... your ISP upload speed is at least 256K - 384K, you didn't stop your active torrent during the upgrade installation, your info on your torrent was set to zero on both upload and download, it didn't self-perform a hash-check after the installation and it started redownloading all the files for a second time, resulting on your user-details on box to be on download as good as double the torrent size. Or simply, you erased the torrent from your list's client, and then redownloaded the .torrent file, but you didn't perform the hash-check...etc, etc...If I'm wrong, please at least provide more information such as torrent client, your upload speed, your torrents dowloaded during these past 10 days from the boxtorrents, how many hours a day your pc uploads, etc... so other forum members can either guess or find an answer. On a side note, with a 256K upload speed you can probably upload around 2-2.3Gb per day (It might even depend on the server that provides you internet). With your upload speed there's no way you're cheating. I've already run out of ideas... lol...Best Regards.