I think it boils down to the difference between these two links, between the question mark and the equals sign before 945:
Andy's link, allows for resorting:
Link navigated to from Photo
Gallery Header; when click "Show Images", bounces you back to Member
Galleries alphabetical listings page:
"Give a man a fish, and he can eat for a day. Give a man a boat, and he can't afford to eat for the rest of his life."