orderby and order with category__and

Hello, I have looked in the forum possible solutions, but I’ve applied work.

I’m making a page, and I need to order some posts belonging to two specific categories, for this, I looked around, and I have to use the category__and. So much perfect.

The problem is that if I use the post category__and not sorted from newest to oldest, it is sorted by date of creation, the first post created the first and last end.

code used
NOTE: Infocus on the subject. They say to ask here:
http://mysitemyway.com/support/topic/blog_list-order#post-110728

CATEGORY__IN = WORK:

if( trim( $pagination ) == 'true' ) {
	$paged = mysite_get_page_query();
	$blog_query->query(array(
		'post__in' => $post_in,
		'category__in' => $category_in,
		'tag__in' => $tag_in,
		'post_type' => 'post',
		'posts_per_page' => $showposts,
		'paged' => $paged,
		'offset' => $offset,
		'ignore_sticky_posts' => 1,
'orderby' => 'date',
'order' => 'DESC',
	));

} else {

	$blog_query->query(array(
		'post__in' => $post_in,
		'category__in' => $category_in,
		'tag__in' => $tag_in,
		'post_type' => 'post',
		'showposts' => $showposts,
		'nopaging' => 0,
		'offset' => $offset,
		'ignore_sticky_posts' => 1,
'orderby' => 'date',
'order' => 'DESC',
	));
}

CATEGORY__AND = NOT WORK

if( trim( $pagination ) == 'true' ) {
	$paged = mysite_get_page_query();
	$blog_query->query(array(
		'post__in' => $post_in,
		'category__and' => $category_in,
		'tag__in' => $tag_in,
		'post_type' => 'post',
		'posts_per_page' => $showposts,
		'paged' => $paged,
		'offset' => $offset,
		'ignore_sticky_posts' => 1,
'orderby' => 'date',
'order' => 'DESC',
	));

} else {

	$blog_query->query(array(
		'post__in' => $post_in,
		'category__and' => $category_in,
		'tag__in' => $tag_in,
		'post_type' => 'post',
		'showposts' => $showposts,
		'nopaging' => 0,
		'offset' => $offset,
		'ignore_sticky_posts' => 1,
'orderby' => 'date',
'order' => 'DESC',
	));
}

If I use category__in, all right, if I use category__and, not working 🙁