Thread:Extension talk:DynamicPageList (Wikimedia)/How to display all recent added articles?/reply (6)

While, are there pages that are both in category 1 and category 2? Note that addfirstcategorydate combined with ordermethod = created will result in dates that jump all over the place. - "" is not the error message you're supposed to see. If you're seeing that it means that either the localization files are missing, or something is wrong with MediaWiki (like stale localization cache).