I noticed an increase in the number of posts for the cats category, this explains it all.

Two additions to make this post even more useful:

• On the main page there is a questionable list of "important" tags. All the way down it says "View all tags..". This will give you a list of (all?) tags so you can choose what tags could be applicable for you.

headers versus tags

• You can only have 5 tags. Keep in mind that a # with text (like #tag) creates an extra tag.
  If have seen people trying to insert a header (# header <- see the space???) and accidentally created a tag because they forgot the space!

Confusion, anger and frustration caused quite some posts to never make it to the end...