显示'；之后的下一篇文章；do_not_duplicate[]'；阻止一个显示

我会尽我所能：

我的博客主页有4个"最新来源：（一个类别）"的提要，由4个不同的类别提供，每个类别显示2个帖子。我发现了do_not_duplicate方法，并用它来防止它们中的任何一个出现两次（因为作者在每个帖子上使用多个类别来填充我们的博客）。这很好，但这是我的下一期：

如果一篇文章的主页上有多个类别，它将只在一个类别中发布，而不是重复（根据需要），但它所在的另一个类别现在只显示1篇文章，我希望它显示2篇。由于第二个"丢失"的帖子是重复的，没有显示，我想知道如果重复被隐藏，我如何显示该类别中的下一个（第三个）帖子。

这是我当前的代码：

 <!-- BEGIN WP PHP BLOG INSERT-->

            <?php query_posts('category_name=campuses&showposts=2'); //Get 2 most recent posts from category with slug campuses ?>
            <h2 class="cat"><?php if (have_posts()) single_cat_title("Latest from: ", true) //if there are posts in the category, display the category name in an H2 ?></h2>
            <?php if (have_posts()) while (have_posts()) : the_post(); $do_not_duplicate[] = $post->ID; // prevents the post from showing up twice on home page?> 
            <?php if ( has_post_thumbnail()) : //check to see if the post has a featured image  ?>
            <a class="postthumb" href="<?php the_permalink(); ?>" title="<?php the_title_attribute(); ?>" >
            <?php the_post_thumbnail(category-thumb); ?>
            </a>
                <?php elseif( catch_that_image() ) : ?>
                <a class="postthumb" href="<?php the_permalink(); ?>" title="<?php the_title_attribute(); ?>" ><img height="150px" src="<?php echo catch_that_image() ?>" /></a>
            <?php endif; ?>
            <h3 class="recent"><a href="<?php the_permalink()?>"><?php the_title(); ?></a></h3>
            <?php the_excerpt ()?><br class="clear" />
            <?php endwhile;?>       
            <?php query_posts('category_name=programs&showposts=2'); //Get 2 most recent posts from category with slug programs?>
            <?php if (have_posts()) single_cat_title('<h2 class="cat">Latest from: ', true) //if there are posts in the category, display the category name in an H2 ?></h2>
            <?php if (have_posts()) while (have_posts()) : the_post(); if ( in_array( $post->ID, $do_not_duplicate ) ) continue; // prevents the post from showing up twice on home page?>
            <?php if ( has_post_thumbnail()) : //check to see if the post has a featured image ?>
            <a class="postthumb" href="<?php the_permalink(); ?>" title="<?php the_title_attribute(); ?>" >
            <?php the_post_thumbnail(category-thumb); ?>
            </a>
                <?php elseif( catch_that_image() ) : ?>
                <a class="postthumb" href="<?php the_permalink(); ?>" title="<?php the_title_attribute(); ?>" ><img height="150px" src="<?php echo catch_that_image() ?>" /></a>
            <?php endif; ?>
            <h3 class="recent"><a href="<?php the_permalink()?>"><?php the_title(); ?></a></h3>
            <?php the_excerpt ()?><br class="clear" />
            <?php endwhile;?>                          
            <?php query_posts('category_name=online&showposts=2'); //Get 2 most recent posts from category with slug online?>
            <?php if (have_posts()) single_cat_title('<h2 class="cat">Latest from: ', true) //if there are posts in the category, display the category name in an H2 ?></h2>
            <?php if (have_posts()) while (have_posts()) : the_post(); if ( in_array( $post->ID, $do_not_duplicate ) ) continue; // prevents the post from showing up twice on home page?>
            <?php if ( has_post_thumbnail()) : //check to see if the post has a featured image ?>
            <a class="postthumb" href="<?php the_permalink(); ?>" title="<?php the_title_attribute(); ?>" >
            <?php the_post_thumbnail(category-thumb); ?>
            </a>
                <?php elseif( catch_that_image() ) : ?>
                <a class="postthumb" href="<?php the_permalink(); ?>" title="<?php the_title_attribute(); ?>" ><img height="150px" src="<?php echo catch_that_image() ?>" /></a>
            <?php endif; ?>
            <h3 class="recent"><a href="<?php the_permalink()?>"><?php the_title(); ?></a></h3>
            <?php the_excerpt ()?><br class="clear" />
            <?php endwhile;?>                          
            <?php query_posts('category_name=service-applied-learning&showposts=2'); //Get 2 most recent posts from category with slug service-applied-learning ?>
            <h2 class="cat"><?php if (have_posts()) single_cat_title("Latest from: ", true) //if there are posts in the category, display the category name in an H2 ?></h2>
            <?php if (have_posts()) while (have_posts()) : the_post(); if ( in_array( $post->ID, $do_not_duplicate ) ) continue; // prevents the post from showing up twice on home page?>
            <?php if ( has_post_thumbnail()) : //check to see if the post has a featured image  ?>
            <a class="postthumb" href="<?php the_permalink(); ?>" title="<?php the_title_attribute(); ?>" >
            <?php the_post_thumbnail(category-thumb); ?>
            </a>
                <?php elseif( catch_that_image() ) : ?>
                <a class="postthumb" href="<?php the_permalink(); ?>" title="<?php the_title_attribute(); ?>" ><img height="150px" src="<?php echo catch_that_image() ?>" /></a>
            <?php endif; ?>
            <h3 class="recent"><a href="<?php the_permalink()?>"><?php the_title(); ?></a></h3>
            <?php the_excerpt ()?><br class="clear" />
            <?php endwhile;?>       
<?php if( function_exists( 'wp_pagenavi ' ) ) {
     wp_pagenavi();
} else {
     next_posts_link('Older Posts');
     previous_posts_link(' | Newer Posts');
} ?>
         </div>
</div>
    <div class="sidebar-wrapper">
        <?php get_sidebar(); ?>
    </div>

            <!--END WP PHP BLOG INSERT-->