I'm having a lot of trouble using php query_posts(array('category__and'=>array(1,3))) - it seems to be pulling anything that's in category 1 regardless of whether it's also in category 3 and I only want the posts if they exist in both categories. And ultimately, I need a bunch of OR statements anyway, so is there a better way than query_posts to do this?
I want a page of posts that exist in a variety of multiple categories -- i.e:
categories 1 AND 3 OR categories 1 AND 5 OR categories 1 AND 6
But not categories 1 AND 4
Any help would be greatly appreciated. Thanks.