I wondered anout that with images I edited and replaced as well, like my Chicago-Jay Pritzker Pavilion Print. It shows the new pic then when you click its the old pic. Also when I signed out and check the old image is shown, and it was changed over a week ago
I've been having that, too. I've reported it in the bug thread...and, I'm not the only one. It's only happened to me in the past 2 or 3 days, but someone else posted that it's been 2 or 3 months for them.