When a blog is deleted the categories do not update.
For instance.....
I created a test blog - under the category "Baby Blogs"
I deleted that blog
The category "Baby Blogs" did not remove the post from its count.
Then I deactivated the "Baby Blogs" category via the admin panel
The category "Baby Blogs" still shows on my site - even after deactivation, and it also still shows (1) - for the blog I had previously made and deleted.
This shows on (at least) the front page & the categories page.
I looked to see if anyone else reported this & I couldn't find anything. If this is redundant, please delete this report.
~PC