That's interesting, the developer notes aren't being generated correctly for your CMS. They should look something like this:
<?php
include('/Applications/MAMP/htdocs/PCMS2/WA_CMS/addtosite.php');
echo WA_getCMSContent($database_PowerCMSConnection, $PowerCMSConnection, 'test', 'Content', false);
?>
Try changing the developers notes in this way:
Replace the @@content-group@@ with what is filled in the Content Location drop down while editing the content in the admin section.
Replace the @@content-ref@@ with what is filled in the Content Area text box while editing the content in the admin section.
Then remove the @@order@@.