Hi Cheryl,
Thanks for reaching out! You are correct that that is the default label for those fields. However, you can change this by editing the template found at wp-content/plugins/event-tickets-plus/src/views/meta.php on line 23. We have instructions on editing templates here. The number is actually set with CSS (see screenshot), so if you would like to change/remove it, you can do so by adding some custom CSS.
Regarding the numbering of attendees for multiple ticket purchases, it applies to the attendees in an order. It doesn’t group all ticket purchases together by user and number the attendees that way.
I hope that helps clear things up! If you need any further clarification or assistance making changes, please let me know!
Thanks,
Jennifer