Unfortunately, neither of these worked.
1. This is still showing PDFs from other categories, unattached PDFs, and PDFs attached to pages. I edited the page listed in the private details so it would be easy for you to test & replicate.
2. This did not change the results, but I am less concerned about this problem. I can always disable the search page and force the search dropdown instead. Unless you have another idea.
Thank you for your help!