So there seems to be an issue with the sort order of images when uploading pictures.
I have 47 images, each named IMG_0000.jpg through IMG_0047.jpg.
I uploaded them in batches of five at a time (PHP kept timing out when trying to upload 10 or more at a time) and the first 20 sorted just fine--numerically, as expected.
From that point forward, several images are out of order despite being uploaded with sequential numbers.
Any ideas as to why this would happen?
Thanks for your attention.