I want to send out past due statements for all my active clients.  I understand how to set up the bulk merge on this dynamic group, but the issue I have when testing is that some of my customers have the same email address (meaning the main office get's the collection notice), and it seems in my test that only the first customer with that email address receive the merge, and the rest of the customers with that exact email address do not get the email.  In otherwords one email address may receive multiple emails from all the different customers