The screenshot you shared corresponds to the attendees for the event. In this case, it seems that the order number #6230 has four tickets in it, thus showing an attendee record for each of the tickets. You can verify this by clicking the order number and navigating to the order page.
Could you please verify that and let us know about it?
I understand. The view is labeled “Attendees” after all, rather than “Orders”. My knee-jerk reaction is to assume a bug because of the atrocious problems ETP has with EDD.