The tag suesa-stories was originally intended to create a category for my stories when I started writing here about 10 months ago. Sadly, posts vanish from a tag after payout, so you won't find anything older than 7 days in there. I keep tagging my stories with it anyway, as I still hope that the interface will display all things tagged with that one day and make my stories easier to find.
The "Microinjections" post is not a fiction story and thus doesn't belong in that tag, correct.
Thanks for the reply! I learn something new here everyday!