This may be old news, maybe not, but it's the first time I notice. I didn't miss seeing this for over a decade did I?
A search for site:example.com returns a number of pages, lets say 1000 for this example. If I add 500 pages to the site and store it in its own category, lets say I call the category "widgets", it gradually gets indexed over time. Nothing new there.
Interesting behavior:
A site:example.com command still yields the 1000 pages a week later, with NO pages from the new widgets category, but a site:example.com/widgets/ returns all 500 new articles already.
~ Why would the widgets category not be part of the overall site command results?
~ Why do the PAGES in the new widgets category rank for specific phrases but not main keywords?
It's almost as if my site is viewed not for the sum of its parts (the whole) but each part on it's own as if it were free from the site. Is this new ?