Dunning sent even though emails were removed

Hi All,

Curious if anyone knows, we have staged dunning enabled, and we wanted to make sure the customer didn't get a reminder notice when we ran the program. We first removed the DUN role from the contacts at the site level. They still got a reminder. We then removed the contacts from the set level and deselected "Send Dunning" at the site profile level and they still got the reminder. How do we turn off reminders for customers who have previously been sent notices.