I have this same problem however I do not partially download torrents so that cannot be the cause. Are there any other reasons that this may happen?
If you were recently downloading torrents, there may be a delay in the data updating.
Make sure you have not partially downloaded any torrents, though. If a torrent is a folder with a video file and some photos, and you don't download the photos to make the torrent 100% complete, it will take up a download slot even though you aren't trying to download the rest.