在Robert和Pieter的建议下，我使用WP\\u Query而不是Query\\u posts重写了循环。现在可以了。谢谢各位。

代码如下：

    <ul class="tabs">
                        <li class="tab-link current" data-tab="tab-1">Most Popular</li>
                        <li class="tab-link" data-tab="tab-2">Recent</li>

                    </ul>




                    <div id="tab-1" class="tab-content current">
                    <div class="slider">
                        <div class="slide">
                        <?php

                        $count = 0;

                        $query = new WP_Query( 
                        array( 
                        \'meta_key\' => \'post_views_count\',
                        \'orderby\' => \'meta_value_num\',
                        \'order\' => \'DESC\',
                        \'post_type\' => \'atls_video\',
                        \'posts_per_page\' => \'-1\'
                                 ) );



while ( $query->have_posts() ) : $query->the_post();
$count++; ?>
                            <?php if ($count%6== 0) : ?>
                                <div class="video-entry m-all t-1of2 d-1of3 cf">
                                    <div class="video-thumb">
                                        <a href="<?php the_permalink(); ?>"><?php the_post_thumbnail( \'video-thumb\' ); ?></a>
                                    </div>
                                    <div class="video-text">
                                        <a href="<?php the_permalink(); ?>" class="title"><?php the_title(); ?></a>
                                        <a href="<?php the_permalink(); ?>" class="read-more">Read More</a>
                                    </div>
                                </div>
                            </div>
                            <div class="slide">

                            <?php else : ?>
                                <div class="video-entry m-all t-1of2 d-1of3 cf">
                                    <div class="video-thumb">
                                        <a href="<?php the_permalink(); ?>"><?php the_post_thumbnail( \'video-thumb\' ); ?></a>
                                    </div>
                                    <div class="video-text">
                                        <a href="<?php the_permalink(); ?>" class="title"><?php the_title(); ?></a>
                                        <a href="<?php the_permalink(); ?>" class="read-more">Read More</a>
                                    </div>
                                </div>

                            <?php endif; ?>
                            <?php endwhile; ?>
                            <?php wp_reset_postdata();?>
                        </div>


                        <div style="clear:both;"></div>



                    </div>
                    </div>






                    <div id="tab-2" class="tab-content">
                    <div class="slider">
                        <div class="slide">
                                <?php

                        $count = 0;

                        $query = new WP_Query( 
                        array( 
                        \'orderby\' => \'date\',
                        \'order\' => \'DESC\',
                        \'post_type\' => \'atls_video\',
                        \'posts_per_page\' => \'-1\'
                                 ) );



while ( $query->have_posts() ) : $query->the_post();
$count++; ?>

                            <?php if ($count%6== 0) : ?>
                                <div class="video-entry m-all t-1of2 d-1of3 cf">
                                    <div class="video-thumb">
                                        <a href="<?php the_permalink(); ?>"><?php the_post_thumbnail( \'video-thumb\' ); ?></a>
                                    </div>
                                    <div class="video-text">
                                        <a href="<?php the_permalink(); ?>" class="title"><?php the_title(); ?></a>
                                        <a href="<?php the_permalink(); ?>" class="read-more">Read More</a>
                                    </div>
                                </div>
                            </div>
                            <div class="slide">

                            <?php else : ?>
                                <div class="video-entry m-all t-1of2 d-1of3 cf">
                                    <div class="video-thumb">
                                        <a href="<?php the_permalink(); ?>"><?php the_post_thumbnail( \'video-thumb\' ); ?></a>
                                    </div>
                                    <div class="video-text">
                                        <a href="<?php the_permalink(); ?>" class="title"><?php the_title(); ?></a>
                                        <a href="<?php the_permalink(); ?>" class="read-more">Read More</a>
                                    </div>
                                </div>

                            <?php endif; ?>
                            <?php endwhile; wp_reset_postdata();?>
                        </div>


                        <div style="clear:both;"></div>
                    </div>
                    </div>