I'm noticing that emails Marketo is sending are showing up in the activity history of Sales Insights in SFDC. For these emails, the Sales Insight option is not checked in the Email Settings within Marketo; My sync options in Marketo aren't set to track these items either (see screen shot). We prohibited the system from tracking these activities back in May and it worked but now I am seeing the information flow through again.
Has anyone run into this? Am I missing another place where Sales Insight tracking can be enabled?