scenario: we've pulled over the member records for people who have RSVP'd to an event. Then the organizer uploads a csv file of attendees that they captured at the event. The imported file includes some of the same people who RSVP'd, and for some of those people it has additional and/or different information than what is in Action Network.

1. how do we avoid displaying the same person twice on the Affinity event attendance page?
2. how can we best get the new/changed information back into Action Network?
3. should we import the people first into AN, rely on their "by email" de-duping, and then refresh the list of RSVP's by re-pulling it from AN?