@Jessica A lot of it has to do with the unique IDs that our proprietary data system is assigning the leads. We put in a similar support ticket and Marketo told us there was nothing...
As a rule of thumb, I don't ever make anything outside of a program.There's a variety of ways to use programs and to sort them so that they reflect how you want to report on them. ...
One thing to keep in mind: we've experienced sending issues with our duplicates. Due to the records having unique Marketo IDs and unique Salesforce IDs they've been receiving mulit...