has_post_thumbnail working for page.php but not single.php

Hi, I have a very weird problem with my loop … am using the roots theme that implements Twitter Bootstrap & working on my own website.

I have two identical files for the single pages & single posts that asks if there’s a featured image .. if so it displays it & if not it just displays the title … now it’s working just fine in the page.php but not in the single.php it always displays the container of the featured image even if it’s not set.

& here’s the code

<?php get_header(); ?>

</header>

  <?php roots_header_after(); ?>

  <?php roots_wrap_before(); ?>
  <div class="back-contain">
  <div id="wrap" class="" role="document">

  <div class="container">
  <?php while (have_posts()) : the_post(); ?>
    <?php roots_post_before(); ?>
  	<section class="row page-header">
  		<?php
  		if ( has_post_thumbnail()) {?>
  		<div class="hero-contain span12">
  			<?php the_post_thumbnail('featured-thumb'); ?>
  		</div>
  		<?php } else {?>
  			<h1 class="entry-title span4"><?php the_title(); ?></h1>
  		<?php }
  		?>

  	</section>

  	<section class="page-content row">
  		<div class="span12">
  			<?php the_content(); ?>
  		</div>
  	</section>
  </div>
  </div>
  <?php endwhile; /* End loop */ ?>
   <?php roots_content_after(); ?>
<?php get_footer(); ?>

I really have no idea where the problem might be.
Thanks in advance