Thanks again greydawgjr. That was how I understood things, but I have found that it doesn't always seem to work that way.

Again, see my Munny Zipper Pulls.

You'll see the images are sorted:

munnyzip-4
munnyzip-3
munnyzip-2
munnyzip-1
munnyzip-5

They were uploaded in order from 1-5. Is it the "-" that screws up the sorting?