I see that WordPress doesn't return 404 for non-existent numbered sub-pages of pages.
For example, I have a page site.com/about on my site.
Now, even if I visit site.com/about/2, which doesn't exist, WordPress returns site.com/about for that request.
In other words, the requesting entity will never know that site.com/about/2 doesn't exist.
Please get this fixed!!