Problem with the sidebar of Newly Installed Theme..

Hello Guys,
I have just changed my theme before a couple of hours, but i could not make sidebar perfect. the problem actually is, the dynamic sidebar is coming in Right hand side of the default sidebar, but i want it to come in the bottom of it. Being a 2 column theme, my theme does not have sufficient space to hold 2 sidebars. I would request experts to check it out at the blog itself, also i am sharing the Sidebar code here. Please help me as i loved this theme and want to keep this for a few months.
The Webblog URL is Commenti.org and the sidebar code is

<div id=”sidebar”>
<?php include (‘sidebar_tabs.php’) ?>

<?php include (‘shortads.php’) ?>

<div class=”widget feedsub”>
<h3 class=”widget-title”>Subscribe</h3>
<div class=”widgetinner”>
<?php
$feedb = get_option(‘wpc_feed_burn’);
?>
<form style=”text-align:center;background-color: #EFEFEF;” action=”https://feedburner.google.com/fb/a/mailverify&#8221; method=”post” target=”popupwindow” onsubmit=”window.open(‘https://feedburner.google.com/fb/a/mailverify?uri=&lt;? echo stripslashes($feedb); ?>’, ‘popupwindow’, ‘scrollbars=yes,width=550,height=520’);return true”>
<span>Enter your email address:</span>
<input type=”text” style=”width:140px” name=”email”/>
<input type=”hidden” value=”<? echo stripslashes($feedb); ?>” name=”uri”/>
<input type=”hidden” name=”loc” value=”en_US”/>
<input class=”feedbtn” type=”submit” value=”Subscribe” /></form>

</div>
</div>
<?php if ( !function_exists(‘dynamic_sidebar’) || !dynamic_sidebar() ) : ?>

<?php endif; ?>
</div>