Index: channels/modarchive.py
==================================================================
--- channels/modarchive.py
+++ channels/modarchive.py
@@ -68,14 +68,14 @@
         sub = []
         self.categories = []
         for uu in rx_current.findall(html):
             (main, id, subname) = uu
             if main:
-                if sub:
-                    self.categories.append(sub)
+                self.categories.append(main)
+                self.catmap[main] = 0
                 sub = []
-                self.categories.append(main)
+                self.categories.append(sub)
             else:
                 sub.append(subname)
                 self.catmap[subname] = id
 
         # .categories and .catmap are saved by reload_categories()