as you upload and edit make sure the image is in a directory. if it's not, then no one may see it as you add more images. i try not to repeat the images if i can, i limit it to no more than 3 galleries. like:
i have listed in steampunk, aviation and animals
you don't want to repeat too much otherwise a customer may leave thinking they saw those images already. i've seen it where people the same images into:
country
landscape
bridges
etc - like 9 of them.
and once you start repeating, you get bored. i try to add it here and there where i think it would fit best.
---Mike Savad