Issue with categories – displaying too many

So if I have, on a new installation: Categories of Uncategorised and Apples, then write a new blog with Apples as the category and view that post – The categories at the bottom of the page are: Uncategorised and Apples.

My code is as follows:

$aisis_category_list = array(
	   'orderby' => 'id',
	   'order' => 'ASC',
	   'style' => 'none',
	   'title_li'=> '',
);

Then I do:

wp_list_categories($aisis_category_list);

Why am I not getting the specific category I selected back as the only category?

note: on rare occasions I only get “uncategorised” back as the category for that post when I am 100% sure I chose only apples.