I've selected a page name in my filter options, but still see site-wide data on Inventory Analysis. Why?

This page has some unique selectors that exist at the top of the page.
If you look to the top right of the page, you'll see selectors that allow you to view data for the Site, Page, or Environment.

The two most commonly used options are Site and Page.
If you have Site selected, it will pull in site-wide data that matches your filter options outside of page name.
If you have Page selected, it will display Service/Domain/File level information for the pages selected.