I think it changed when you hit "save changes" earlier.
I think you have to refresh that page after you save the changes and then you'll see it in the box. I haven't changed my picture in awhile so I'm not 100% certain what it shows after you hit "save changes."
When you do upload it though, there's a tiny box near "select file" where your uploaded picture goes. It's tiny though so maybe you didn't see it at first.