Second Life Copybot

I downloaded some mesh items from here and then uploaded to SL. I had the items for awhile and now they are gone out of my inventory. A couple were dresses and some hair that recently were posted. Now I've just learned how to download and then upload to SL. Is there something I'm doing wrong?

Hello again, I forgot to mention that not only is the item gone but so is the textures I uploaded that went with them. Any clue what I did wrong?