The Guest profile mapping screen defaults to display only 10 records at once. If you load more guest profiles to show more than 10, and then update one profile to 'no match', the entire screen updates and defaults back to only 10 records again. There should be an option to change the default display to more than 10 records. The 'Ignore' option should be available in Guest Profile mapping as well. Or at least the event the guest registered for, so they can be easily found in the Guest Dashboard for the event and marked as 'Ignore'. Some guests that are already mapped remain on the Guest Profile Mapping screen even after mapping them again. All mapped guests should be removed from the screen to make it easier to review new records.