W3C Validations of theme.

Hello All i am validating wordpress theme called tuts press.

and there was a lot of errors in XHTML and i have correct them.
but at last 23 errors renaming and i cant find the source code of them in theme file’s.

on front page it’s using this code to show latest post.

<ul id="column2"><li>
<?php 

			$col2postcount = 1;

			if(get_option('tpthemes_column2_posts_type') == 'Featured Posts') {

			  query_posts( array(
				  'offset' => '1',
				  'tag' => get_option('tpthemes_featured_post_tags')
				  ));

			  }

			if( have_posts() ) : while( have_posts() ) : the_post();

				if($col2postcount < 6) {
					include(TEMPLATEPATH. '/includes/templates/home-featured-loop2.php');
				}
				else {
					include(TEMPLATEPATH. '/includes/templates/home-featured-loop3.php');
				} 

			$col2postcount ++;

			endwhile; endif; wp_reset_query();
		?>
</div>

and i am having problems here. the output of this code in XHTML is

<ul id="column2"><li>

<div class="thumbnail-sag"><li class="clear featured-1"> 

<a href="https://misning.co.cc/2012/07/education-ends-and-means/" rel="bookmark"></a>

	<h2 class="entry-title"><a href="https://misning.co.cc/2012/07/education-ends-and-means/" title="Permalink to Education Ends and Means" rel="bookmark">Education Ends and Means</a></h2>

	<div class="entry-meta">

		<abbr title="July 5, 2012 at 10:59 am">6 days ago</abbr> <span class="entry-sep">|</span> <span class="entry-comment"><a href="https://misning.co.cc/2012/07/education-ends-and-means/#respond" title="Comment on Education Ends and Means">0 comment</a></span><span class="entry-cat">

	<a href="https://misning.co.cc/category/general-topics/">General Topics</a>	</span></span>

	</div> <!--end .entry-meta-->
</div>

and it’s showing following errors
1:
Line 131, Column 56: document type does not allow element “li” here; missing one of “ul”, “ol”, “menu”, “dir” start-tag
<div class="thumbnail-sag"><li class="clear featured-1">

2:
Line 140, Column 90: end tag for element “span” which is not open

<a href="https://misning.co.cc/category/general-topics/">General Topics</a>	</span></span>

and i can not find them in theme files. please anyone can guide me to solve this problem.

and for more detail about this problems you can visit on this site.
https://misning.co.cc
(i have not upload it on real site yet.)

many many thanks in advance.