Ok, I'm missing something obvious, but I'm just not seeing it.
I have a file in Photoshop Elements. I went to Save For Web. The image is 1016x720. The file is 559.3kb. When I bring it into my porfolio, and click on the image, it shows the image detail and shows that it is 559.3kb. When I click on View Photo Page, it shows me a smaller image. When I right click and select properties, it says that the image is 800px × 567px and 97.3kb.
What the heck is going on? Why can't I get the image to be the right size? I've tried with a different image, and that seems to work fine.
Images over 800 pixels are automatically resized for the photo's display page so that those pages all stay a reasonable size; as noted, there's then a link to view the full-sized image in isolation.