Creation Date not showing correctly

Hi,

On my blog.read.php page here http://familyweek.com.au/whats-happening/entry/test-event-2 the "Creation Date" is displayed correctly under the blog title.

But on my blog.item.php page here http://familyweek.com.au/whats-happening the "Creation Date" is displayed incorrectly under the blog title.

Both files have exactly the same code:

<span class="blog-author">

<?php echo $this->formatDate( '%d %B %Y' , $blog->{$this->getParam( 'creation_source')} );?>

</span>

Can I get some help with this please?

Thanks.