Could it be a momentary glitch in the system? When I look for the category:
http://healthbeauty.shop.ebay.ca/
there are oodles of subcategories, including make-up down on the left. When I click on make-up I get 311,536 results. That's a lot, so when I look to the left under Categories; Makeup, there are several ways to narrow the search, like Eyes(64,766 listings), Face(55,146 listings), Lips(65,217 listings), and so on.
Am I missing something? I find tons of stuff in that category.