Hmmm, that's an interesting one.
I am not able to reproduce this, the developer notes for my installation are generated correctly, for example:
echo WA_getCMSContent($database_PowerCMSConnection, $PowerCMSConnection, 'site page', 'footer', false);
the developer notes code should be specific to the page already. Just out of curiosity, what are the names you are using for Content Area and Content Location?