when clicking on "add picture" a pop up box will open. In the box you will see "add files" in lower left.
1) Click "add files" to choose your photo or photos (up to 6)
2) Then click "upload"
3) You will see photos come up on top page of pop up
4) When finished just exit out of pop up (you will not see images at this point but they are added.) You will see images once you submit auction.