I’m querying to get a list of all posts, 20 posts_per_page, but the result shows all posts, but with 21 posts per page. If I change posts_per_page to 19, then 20 show. One post is sticky and shows up twice; not sure if that is causing the problem.
Code:
$allposts = array(
'post_type' => 'post',
'posts_per_page' => 20
);
$wp_query = new WP_Query($allposts); ?>
<?php while ( $wp_query->have_posts() ) : $wp_query->the_post(); ?>
<li><?php the_title(); ?></li>
<?php foo_pagination(); ?>
<?php endwhile; ?>
Sticky posts do add to the post count rather than being included in it. You can alter your query to ignore sticky posts though.
But you are also missing pagination parameters.