Each time you make a purchase and order is generated and each order can have one or more associated entries.
All your orders appear on the section "My Orders" and within each order will see the entries. At least there is always an entry for each order.
You may have made a purchase but have not yet indicated the name or names of attendees and this is absolutely necessary to attend the event or course. If you have not done it you must do it and download the tickets and present them at the entrance of the event or course.