diff --git a/app/controllers/admin/archive_files_controller.rb b/app/controllers/admin/archive_files_controller.rb
index 8dfaaba..647a333 100644
--- a/app/controllers/admin/archive_files_controller.rb
+++ b/app/controllers/admin/archive_files_controller.rb
@@ -73,8 +73,8 @@ class Admin::ArchiveFilesController < OrbitAdminController
             ArchiveCategory.create(category_id: category.id.to_s)
         end
     end
-    cats_with_nil = ArchiveCategory.all.in(sort_number: nil).order_by(sort_number: 'desc')
-    cats_no_nil = ArchiveCategory.all.not_in(sort_number: nil)
+    cats_with_nil = ArchiveCategory.all.in(sort_number: nil)
+    cats_no_nil = ArchiveCategory.all.not_in(sort_number: nil).order_by(sort_number: 'desc')
     @cats = cats_no_nil.concat(cats_with_nil).collect do |cat|
         [categories.where(:_id => cat.category_id).first,cat.sort_number.to_s]
     end