you seem to be closing the div .row too early (before the sidebar) and not having a .span3 in the sidebar div;
from the html output in the browser - change this section's related code in your templates:
</div> <!-- /.span9 articles -->
</div> <!-- /blog-->
<div id="primary" class="widget-area" role="complementary">
to:
</div> <!-- /.span9 articles -->
<div id="primary" class="widget-area span3" role="complementary">
(not widely tested)
the problem seems to be with the html structure of your edits - not really WordPress related.