To explain the above: The original uploader wasn't fast enough to grab the unrevised image in the gallery (this one has less SFX) and uploaded the wrong image on upload; this one is the prerevision (going by the dates).
Both revised posts are still available, the revised post (and the subsequent revision of that post) are live at post #2904725 and post #2904739. I think it's better for the gallery to have every best available version of an image preserved in this sort of order, so I would hope this is okay.