# posts (not days) to display is set to 20 in the WP UI. That works properly on the main blog page. (www.ponderethereal.com)
I set up a sub-blog (www.ponderethereal.com/asperger) and I limited it to certain categories using in_category.
It seems to be looking at the last 20 most recent posts and THEN displaying the ones that match the category criteria out of that 20. So I might get no posts that show up - or I might get 1 or 5... depending upon how many of the last 20 posts are in those categories.
How do I get it to look for the categories FIRST and then display the correct number of posts?