Is there any reason why when inserting a new article from outside EditPage.php doesn't update the category links?

$title = Title::newFromText("Hellos"); $article = new Article($title); $ret = $article->insertNewArticle("hi there![[Category:Greetings]]", "", false, false, false)

The article is successfully created and links to the Greetings category. However, the "Greetings" category does not show the new article in the list of articles in that category.

Travis