Wordpress Kommentarbereich Problem

// Comments form input fields
function comment_form_changed_fields($fields){
    $fields = array(
        'author' =>    '<div class="comment-form-author"><label for="author">' . 'Name' . '</label> ' . ( $req ? '<span class="required">*</span>' : '' ) .            '<input id="author" name="author" type="text" value="' . esc_attr( $commenter['comment_author'] ) . '" size="30"' . $aria_req . ' /></div>',
        'email' =>    '<div class="commentz-form-email"><label for="email">' . 'Email' . '</label> ' . ( $req ? '<span class="required">*</span>' : '' ) .            '<input id="email" name="email" type="text" value="' . esc_attr(  $commenter['comment_author_email'] ) . '" size="30"' . $aria_req . ' /></div>',    );


    return $fields;
}
add_filter('comment_form_default_fields', 'comment_form_changed_fields');


// Comment form default fields
function comment_form_changed_defaults($defaults){
    $fields = apply_filters('comment_form_default_fields', $fields);


    $defaults = array(   
        'fields'       => $fields,        
        'comment_field'        => '<label for="comment">' . 'Comment' . '</label> <textarea id="comment" name="comment" aria-required="true" required="required"></textarea>',        
        'must_log_in'          => '<div class="must-log-in">' . sprintf('You must be <a href="%s">logged in</a> to post a comment.', wp_login_url( apply_filters('the_permalink', get_permalink( $post_id)))) . '</div>',        
        'logged_in_as'         => '<div class="logged-in-as">' . sprintf('<a href="%1$s" aria-label="Logged in as %2$s. Edit your profile.">Logged in as %2$s</a>. <a href="%3$s">Log out?</a>', get_edit_user_link(), $user_identity, wp_logout_url( apply_filters('the_permalink', get_permalink($post_id)))) . '</div>',
        'comment_notes_before' => '<div class="comment-notes"><span id="email-notes">' . 'Your email address will not be published.' . '</span>'. ( $req ? $required_text : '' ) . '</div>',              
        'comment_notes_after'  => '',
        'id_form'              => 'commentform',
        'id_submit'            => 'submit', 
        'class_form'           => 'comment-form', 
        'class_submit'         => 'submit', 
        'name_submit'          => 'submit',
        'title_reply'          => 'Leave a Reply',
        'title_reply_to'       => 'Leave a Reply to %s',
        'title_reply_before'   => '<h3 id="reply-title" class="comment-reply-title">',
        'title_reply_after'    => '</h3>',
        'cancel_reply_before'  => '<small>',
        'cancel_reply_after'   => '</small>',
        'cancel_reply_link'    => 'Cancel reply',
        'label_submit'         => 'Post Comment',
        'submit_button'        => '<input name="%1$s" type="submit" id="%2$s" class="%3$s" value="%4$s" />', 
        'submit_field'         => '<div class="form-submit">%1$s %2$s</div>',
        'format'               => 'xhtml',
    );        
    return $defaults;
}
add_filter('comment_form_defaults', 'comment_form_changed_defaults');

<?php if ( comments_open() ) : ?>


  <?php if ( have_comments() ) : ?>


    <h3 id="comments-title"><?php comments_number('0 Comments', '1 Comment', '% Comments') . get_the_title(); ?></h3>


    <ol class="comment-list">
      <?php wp_list_comments( array('style' => 'ol', 'avatar_size' => 55, 'callback' => 'comment_list'));?>
    </ol>


    <?php if ( get_comment_pages_count() > 1 && get_option( 'page_comments' ) ) { ?>
      <?php previous_comments_link( '<i class="icon icon icon-left-open"></i> Older Comments' ); ?>
      <?php next_comments_link( 'Newer Comments <i class="icon icon icon-right-open"></i>' ); ?>
    <?php } ?>


   <?php endif; ?>
   
   <?php comment_form(); ?>
<?php endif; ?>


<?php if ( ! comments_open() ) : ?>
  Comments are closed.
<?php endif; ?>