Let’s tackle one thing at a time….
Allergy & Immunology it has a single child category,
Internal Medicine ID
If you set category
9 as the parent for the drop down, displaying
Internal Medicine is the expected result.
To have a
Specialties drop down, you should first create a Specialties category and then edit the existing categories so the parent is set to
Then edit the search to be the ID of the
Specialties category parent.
Hope this makes sense!