User blog comment:Sarah Manley/New Editor Scheduled for Sitewide Release/@comment-3030984-20110901194648/@comment-126761-20110902104854

The updated category module doesn't really tweak how it works - the duplication of those tags has long been a technical restriction (that allows us to make each category a self-enclosed item for management). I'd very much prefer that it didn't have to make such changes to wikitext, though, and is something I've requested to look at improving.