VQMod add code inside div not working

VQMod add code inside div not working

I've got this original code:
<div class="heading">
<h1><img src="view/image/customer.png" alt="" /> <?php echo
$heading_title; ?></h1>
<div class="buttons"><a href="<?php echo $cancel; ?>"
class="button"><?php echo $button_cancel; ?></a></div>
</div>
My VQMod file looks like this:
<modification>
<id>Backorder</id>
<version>1.0</version>
<vqmver>1.2.3</vqmver>
<author>Author</author>
<file name="admin/controller/sale/order.php">
<operation>
<search position="after"><![CDATA[$this->data['heading_title']
= $this->language->get('heading_title');]]></search>
<add><![CDATA[
$this->data['backorder_text'] = 'Backorder';
$this->data['backorder_link'] =
$this->url->link('backorder/backorder', 'token=' .
$this->session->data['token'] . '&ouid=' . $order_id, 'SSL');
]]></add>
</operation>
</file>
<file name="admin/view/template/sale/order_info.tpl">
<operation>
<search position="after"><![CDATA[<?php echo $button_cancel;
?></a>]]></search>
<add><![CDATA[<a href="<?php echo $backorder_link; ?>"
class="button"><?php echo $backorder_text; ?></a>]]></add>
</operation>
</file>
</modification>
If i understand VQMod right, should this be the outputted HTML:
<div class="heading">
<h1><img src="view/image/order.png" alt=""> Bestellingen</h1>
<div class="buttons">
<a href="leLink" target="_blank" class="button">Factuur
printen</a>
<a href="leLink" class="button">Annuleren</a>
<a href="leLink" class="button">Backorder</a>
</div>
</div>
But this is generated:
<div class="heading">
<h1><img src="view/image/order.png" alt=""> Bestellingen</h1>
<div class="buttons">
<a href="leLink" target="_blank" class="button">Factuur
printen</a>
<a href="leLink" class="button">Annuleren</a>
</div>
<a href="leLink" class="button">Backorder</a>
</div>
As you can see, is the link i insert is out of the div. This is ruining
the layout. Does anybody knows what i'm doing wrong? Because i don't know
it anymore...
Thanks in advantage