This can easily be changed for the posts to inherit the theme setting position of the sidebars. Edit your single.php template and find this line:

<div class="twelve columns">

Place this before it:

<?php 
	// Check where sidebar should be
	$sidebar_left = false; 
	if(ot_get_option('sidebar_layout','right-sidebar')=='left-sidebar'){
		$sidebar_left=true;
	}
	// Place sidebar if it's left
	($sidebar_left ? get_sidebar() : '');
?>

Then replace this:

<?php get_sidebar(); ?>

with this:

<?php // Place sidebar if it's right
	(!$sidebar_left ? get_sidebar() : '');?>

That should do it.