Just a feature that allows new data input from a new funnel to update the old funnel information, because I notice that once data is collected through a funnel, and it does not matter if you delete the contact, any data collected in the new funnel that comes from an already listed lead whether deleted or not retains the information from the first funnel input. That means any additional data that you might collect from retargeting efforts through a new funnel is not collected because the system is hard coded to retain the first data input and custom fields from the first funnel used to collect the initial data.