wp_count_comments issue

add_shortcode( 'rwcrnhome', 'rwcrn_home' );

function rwcrn_home () {
    $output = '';
    $rwcrn_posts = get_posts( array(
        'category_name' => 'news',
        'numberposts'   => 40,
        'orderby' => 'post_date',
        'order' => 'DESC'
        )
    );

    foreach ( $rwcrn_posts as $rwcrn_post ) {
        $images = get_children( array(
            'post_parent' => $rwcrn_post->ID,
            'post_status' => 'inherit',
            'post_type' => 'attachment',
            'post_mime_type' => 'image',
            'order' => 'ASC',
            'orderby' => 'menu_order ID'
            )
        );
        foreach ( $images as $image ) {
            //  Thumbnail
            $output .= wp_get_attachment_image( $image->ID, 'thumbnail', FALSE,  array( 'align' => 'left', 'style' => 'padding-right: 10px' ) );
            break;
        };
        $output .= '<a href="';
        $output .= get_permalink( $rwcrn_post->ID );
        $output .= '">';
        $output .= get_the_title( $rwcrn_post->ID );
        $output .= "</a><br /><i>";
        $output .= get_the_time( get_option('date_format'), $rwcrn_post->ID );
        $output .= '<span class="sep"> by </span> <span class="author vcard">';
        $comments_count = wp_count_comments( $rwcrn_post->ID );
        setup_postdata( $rwcrn_post );
        $output .= get_the_author();
        $output .= '</span></i><br />';
        $output .= get_the_excerpt();
        wp_reset_postdata();
        if ( $comments_count->approved > 0 ) {
            $last_comment = get_comments( array( 'page_id' => $rwcrn_post->ID, 'number' => '1', 'orderby' => 'comment_date_gmt', 'order' => 'DESC' ) );
            $current_time_gmt = time() - date('Z');
            foreach ( $last_comment as $comment ) {
                if ( $comments_count->approved == 1 ) {
                    $output .= '<br /><span style="color: rgb(0, 0, 255);">Comment ' . round( ( $current_time_gmt - strtotime( $comment->comment_date_gmt ) ) / 3600, 1 ) . ' hr. ago</span>';
                } else {
                    $output .= '<br /><span style="color: rgb(0, 0, 255);">' . "Most Recent Comment (of $comments_count->approved) " . round( ( $current_time_gmt - strtotime( $comment->comment_date_gmt ) ) / 3600, 1 ) . ' hr. ago</span>';
                }
            }
        }
        $output .= '<br clear="all" /><img src="http://rwcrn.com/wp/wp-content/uploads/2011/10/1px.png" width="100%" height="3">';
        wp_reset_postdata();
    }
    return $output;
}