I've looked through a lot of discussions, and most are focused on the discrepancies in Opens between reports and smart lists but I'm having a different issue. I'm using an Email Performance Report, and I'm seeing far lower Sent, Delivered, etc. numbers using a Smart List 'Was Sent Email' filter. I'm only pulling in Free emails with the smart list vs. running the report with out a Smart List filter and manually pulling the Free emails from all others. Has anyone else experienced this and have any idea why it's happening?