This category is categorized in itself because I have used __NOINDEX__
on the category page.
Wikimedia Foundation projects don't do that; instead, they block indexing of this category in robots.txt.
It doesn't look like you've configured a robots.txt here. Note that wikipedia:MediaWiki:Robots.txt is a WMF-specific feature. --Eighty5cacao (talk) 16:23, 3 May 2013 (UTC)