Thanks for your help on this. I ended up removing the one put in there by the plugin and just adding in my own code for the featured image.
Becky to remove the second image go to:
Events -> Settings -> Viewing Events
Check the box next to Hide featured image from event details page
This will remove the featured image on the single event page. I then added in the featured image above the loop like so.
<p style="text-align: center;"><?php the_post_thumbnail( 'full' ); ?></p>
<?php if (have_posts()) : while (have_posts()) : the_post();?>
<?php the_content(); ?>
<?php endwhile; endif; ?>
No duplicates and allows me to freely move it around with css as I wish.
