If you are wondering why on the “Entries Page” there are entries with only email addresses displayed, these are bonus entries. As you can see below the email@example.com email is a bonus entry for firstname.lastname@example.org. All the bonus entries will be below the user who has referred the entrant.
Any entry that does not have additional form field data present will have a corresponding entry in the export file that does show all of the information they submitted with their first entry. We do it this way so that the data is not duplicated several times for each entry they get, while still saving that data for you.