now i have about 50 downloads already in my site

i wanted to somehow take out the "filesize" field out of my downloads and i tried doing that by going into myphpadmin...

after that i went into my nuke database and i went into the downloads_downloads section and found the filesize field...so then i tryed going to drop and i dropped it...

so when i went bak into my site and went into a category and all i saw was one download...all of my other downloads were somewhere gone but they were still in my database...i dont know what happened and i cant seem to undo this problem...all of my other downloads are no longer displayed...please help me out...thanks in advance