Problem with older entries in homepage

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when I click on “older entries” in my home page, it goes to a second link but it shows the same posts. I’m not an expert in PHP but I think I need to modify something in the index.php, this is the full code section that I think I need to modify:

<div class="container">
    <div class="post_content">
        <div class="home_posts">
            <?php
                $args2 = array(
                'post_type' => 'post',
                'posts_per_page' => 10,
                'paged' => ( get_query_var('paged') ? get_query_var('paged') : 2),
                );
                $query = new WP_Query( $args2 );
                if ( $query->have_posts() ) :
                    while ( $query->have_posts() ) : $query->the_post();
                        echo '<div class="grid_post">
                                <h3><a href="'.get_permalink().'">'.get_the_title().'</a></h3>';
                        $type = get_post_meta($post->ID,'page_featured_type',true);
                        switch ($type) {
                            case 'youtube':
                                echo '<iframe width="560" height="315" src="http://www.youtube.com/embed/'.get_post_meta( get_the_ID(), 'page_video_id', true ).'?wmode=transparent" frameborder="0" allowfullscreen></iframe>';
                                break;
                            case 'vimeo':
                                echo '<iframe src="http://player.vimeo.com/video/'.get_post_meta( get_the_ID(), 'page_video_id', true ).'?title=0&byline=0&portrait=0&color=03b3fc" width="500" height="338" frameborder="0" webkitAllowFullScreen mozallowfullscreen allowFullScreen></iframe>';
                                break;
                            default:
                                echo '<div class="grid_post_img">
                                            <a href="'.get_permalink().'">'.get_the_post_thumbnail().'</a>
                                        </div>';
                                break;
                        }
                        echo '<div class="grid_home_posts">
                                    <p>'.dess_get_excerpt(120).'</p>
                                </div>
                            </div>
                            ';
                    endwhile;
            ?>
    </div>
    <?php
        echo '<div class="load_more_content"><div class="load_more_text">';
                ob_start();
                    next_posts_link('LOAD MORE',$query->max_num_pages);
                    $buffer = ob_get_contents();
                ob_end_clean();
                if(!empty($buffer)) echo $buffer;
            echo'</div></div>';
        $max_pages = $query->max_num_pages;
            wp_reset_postdata();
        endif;
    ?>
    <span id="max-pages" style="display:none"><?php echo $max_pages ?></span>
    </div>
    <?php get_sidebar(); ?>
    <div class="clear"></div>
</div>
</div>

Could it be here:

$args2 = array(
                'post_type' => 'post',
                'posts_per_page' => 10,
                'paged' => ( get_query_var('paged') ? get_query_var('paged') : 2),
                );

Thank you very much. This is my website in case you want to check what I mean: http://www.wha2wear.com