Master Page "perch_content_create" issues

I've created a mastepage file and when I go into perch and create a page it lists the page in my page list and within the page it shows all the regions with the correct options inside each region which I created using:

<?php perch_content_create.... tags.

I then populate these regions in perch but when I click save and visit the page, the page opens up perfectly but theres none of the content in the pages that I inputted through regions using the above tag.

Oddly enough regions that are not pre set eg using "<?php perch_content('Banner Title'); ?>" work perfectly.

Here is an example of one of the regions that does not display on the page at all:

<?php perch_content_create('Banner Title', array( 'template' => 'sub_page_banner_overlay.html', 'multiple' => false, )); ?>

I'm running Perch 2.8.6. I believe the actual page is set up correctly as it wouldnt actually show correctly when created with all the regions and templates displays...

At the top of the master page I have this too:

<?php if (!defined('PERCH_RUNWAY')) include($_SERVER['DOCUMENT_ROOT'].'/perch/runtime.php'); ?>

Thanks for your help!