I can't see your screenshot of page 2, but I can guess what you're trying to point out.
When you click any page that is after page 1, the page reloads to show you every single page before it up to the bottom of the page you chose. For instance, if you click page 4, it'll show you everything from page 1, 2, 3, and 4. If you notice, the scroll bar on the right gets smaller the higher the page you go.
Now, whether or not this was coded intentionally for the home page is an entirely different question.