I have done some diagnostics, and it seems that the original theme (before being edited) also suffers from the same problem.
I am fairly confident that the problem lies in the comments.php file, the code is attached
<?php // Do not delete these lines
if ('comments.php' == basename($_SERVER['SCRIPT_FILENAME']))
die ('Please do not load this page directly. Thanks!');
if (!empty($post->post_password)) { // if there's a password
if ($_COOKIE['wp-postpass_' . COOKIEHASH] != $post->post_password) { // and it doesn't match the cookie
?>
<p class="nocomments">This post is password protected. Enter the password to view comments.
<p>
<?php
return;
}
}
/* This variable is for alternating comment background */
$oddcomment = 'alt';
?>
<!-- You can start editing here. -->
<?php if ($comments) : ?>
<h5>
<?php comments_number('No Responses', 'One Response', '% Responses' );?>
to “
<?php the_title(); ?>
”</h5>
<ol class="commentlist">
<?php foreach ($comments as $comment) : ?>
<li class="<?php echo $oddcomment; ?>" id="comment-<?php comment_ID() ?>"> <cite>
<?php comment_author_link() ?>
Says: </cite>
<?php if ($comment->comment_approved == '0') : ?>
<em>Your comment is awaiting moderation.</em>
<?php endif; ?>
<small><a href="#comment-<?php comment_ID() ?>" title="">
<?php comment_date('F jS, Y') ?>
at
<?php comment_time() ?>
</a>
<?php edit_comment_link('e','',''); ?>
</small> <br />
<?php comment_text() ?>
</li>
<?php /* Changes every other comment to a different class */
if ('alt' == $oddcomment) $oddcomment = 'alt2';
else $oddcomment = 'alt';
?>
<?php endforeach; /* end for each comment */ ?>
</ol>
<?php else : // this is displayed if there are no comments so far ?>
<?php if ('open' == $post->comment_status) : ?>
<!-- If comments are open, but there are no comments. -->
<?php else : // comments are closed ?>
<!-- If comments are closed. -->
<p class="nocomments">Comments are closed.</p>
<?php endif; ?>
<?php endif; ?>
<?php if ('open' == $post->comment_status) : ?>
<h5>Leave a Reply</h5>
<?php if ( get_option('comment_registration') && !$user_ID ) : ?>
<p>You must be <a href="<?php echo get_option('siteurl'); ?>/wp-login.php?redirect_to=<?php the_permalink(); ?>">logged in</a> to post a comment.</p>
<?php else : ?>
<form action="<?php echo get_option('siteurl'); ?>/wp-comments-post.php" method="post" id="commentform">
<?php if ( $user_ID ) : ?>
<p>Logged in as <a href="<?php echo get_option('siteurl'); ?>/wp-admin/profile.php"><?php echo $user_identity; ?></a>. <a href="<?php echo get_option('siteurl'); ?>/wp-login.php?action=logout" title="Log out of this account">Logout »</a></p>
<?php else : ?>
<p><small>Name
<?php if ($req) echo "(required)"; ?>
</small>
<input type="text" name="author" id="author" value="<?php echo $comment_author; ?>" size="22" tabindex="1" />
</p>
<p><small>Mail
<?php if ($req) echo "(required)"; ?>
</small>
<input type="text" name="email" id="email" value="<?php echo $comment_author_email; ?>" size="22" tabindex="2" />
</p>
<p><small>Website</small>
<input type="text" name="url" id="url" value="<?php echo $comment_author_url; ?>" size="22" tabindex="3" />
</p>
<?php endif; ?>
<!--<p><small><strong>XHTML:</strong> You can use these tags: <?php echo allowed_tags(); ?></small></p>-->
<p>
<textarea name="comment" id="comment" cols="5" rows="8" tabindex="4"></textarea>
</p>
<p>
<input type="submit" name="submit" id="submit" tabindex="5" value="Submit Comment" />
<input type="hidden" name="comment_post_ID" value="<?php echo $id; ?>" />
</p>
<?php do_action('comment_form', $post->ID); ?>
</form>
<?php endif; // If registration required and not logged in ?>
<?php endif; // if you delete this the sky will fall on your head ?>
Any thoughts as to what may be breaking it?