Hi Erin, you can use the field SFDC Type (contact, lead or user) to filter these results down so that the alert only goes at the appropriate time. I'm not sure exactly what your setup is, but you can either use this as a filter at the smartlist level so that contacts never enter that campaign at all, or you can use it as a choice at the flow level if there are other things in that smart campaign that you want to have happen for both leads and contacts.