The template dbtech_dbseo_navbit_link contains improperly nested and thus invalid HTML:
This should be:
An LI can only be inside UL or OL, not a DIV.
Code:
<div itemscope="itemscope" itemtype="http://data-vocabulary.org/Breadcrumb">
<li class="navbit"><a href="{vb:raw nav_url}" itemprop="url"><span itemprop="title">{vb:raw nav_title}</span></a></li>
</div>
Code:
<li class="navbit" itemscope="itemscope" itemtype="http://data-vocabulary.org/Breadcrumb"><a href="{vb:raw nav_url}" itemprop="url"><span itemprop="title">{vb:raw nav_title}</span></a></li>