some posts are not appearing on wordpress code example
Example: wordpress have_posts not working
//As per my understandings of your issue:
//You are not querying posts you need to show. Use wp_query() to query your posts before loop.
$wp_query = new WP_Query(array('posts_per_page'=>-1));
while ($wp_query->have_posts()) : $wp_query->the_post();
//your code here
endwhile;