There's an additional stylesheet call that should be removed firstly, i don't think i removed this before giving you a link, because i was unsure of it's use, but i can see now it shouldn't be there.
Links the following file.
http://straightpaths.mzbc.com/wp-content/themes/renoville/style_.css
I removed it on the copy i have, but if i remember correctly it's above this line.
<link rel="stylesheet" href="<?php bloginfo('stylesheet_url'); ?>" type="text/css" media="screen" />
In regard to the sidebar issue, i hadn't noticed until you pointed it out, it indeed does the same for me with widgets.
I'll make it function like the non-widget sidebar... will post back some code soon enough... :)