[JamesC70]

Your category names should be showing where you have "Put First..." and "Put Second ..." Have you installed a mod that changes those?

Screenshot from my 3.8.4, my first category is where rules, announcements, etc reside.

Announcements : Display Order 40 : Parent Forum No one
+-- Introduction : Display Order 41 : Parent Forum Announcements
+-- Rules : Display Order 42 : Parent Forum Announcements

Category Two : Display Order 50 : Parent Forum No one
+-- Second Category Forum 1 : Display Order 51 : Parent Forum Category Two
+-- Second Category Forum 2 : Display Order 52 : Parent Forum Category Two

....

Moderator Area : Display Order 990 : Parent Forum No one
+-- Moderator Talk : Display Order 991 : Parent Forum Moderator Area
+-- Reported Posts : Display Order 992 : Parent Forum Moderator Area