Your pictures show up in the items for sale, but not in the avatar? Hummmm, wonder if it has to do with how the pictures are uploaded from your computer. When I've sold items on TOTV, I use the paperclip that appears above the composition box to upload pictures. It's next to the smiley face. When I upload using that, and following the steps that are self explanatory, the picture shows up in the avatar of the items for sale.
I stayed at a Holiday Inn....