Context menus are built from most-specific at the top to least-specific at the bottom. "All files and folders" is the least specific filetype there is (as it applies to everything), so items added that way go underneath anything else.
Context menus are built from most-specific at the top to least-specific at the bottom. "All files and folders" is the least specific filetype there is (as it applies to everything), so items added that way go underneath anything else.