I had a similar problem with a slight change.
First i had a sword with .15 speed slash 2 i believe, i couldn't sell it because it refused to would always miss, it would never hit the NPC.
Then i come on a week later, and it changed to a /4.2, speed 2.
I was amazed, it was a very good sword out of nowhere ,and it WAS hitting.
Now i come back like 5 days ago, i check it, it reverted back to it's .15 speed and /2 appearance....
It's really weird i don't know why, and i was really excited when it was a /4.
Anyways, maybe it's the Devs tinkering with the Weapons slashes?
Can anyone help us?

~~Datruth