It's not "technically" a bug, it's because of the random nature of the stats application to weapons. Still, they should categorize them better. It's possible it could be fixed in the upcoming patch.
As for your link, it's because there's a '~' in the file name. Check the URL again.
OneHanded_zpsel5xunnq.jpg ~ original
I tested replacing the '~' with a '-', and the link works.