Hey Murray,
Thanks for reaching out. There is not a way to sort by ticket type at this time but it is something we are looking into for a future release at some point.
As for clearing sales from an Attendees List, the best thing I would recommend here is to delete the event outright. Now that your site live, create the event and tickets anew on the live site and its attendees list should be a clean slate.
↑ If this specific course of action is not possible, can you clarify exactly why not?
Thank you!
George