I'm not entirely sure what it is, but I get confused very quickly selecting pages and/or looking into page settings.
Seeing the blue and and gray makes me wonder which one I'm at. Thinking about it, I know now that the gray is the opened page settings, while blue is the opened up page that is now behind the page settings.
I think what I'm expecting is that when I get into the Page Settings of any page, that the page behind it (blue selected) is the exact same. So that when I close it <<, I see the one I just worked on.