Did you claim all tickets under the name of the main buyer? 

We recommend that all tickets be registered in the name of the person who will be using the ticket. Valid ID may be requested at the entrance. If all tickets are registered in the same name, all attendees must be present at the entrance at the same time as the main buyer when the tickets are scanned.

If the main buyer is unable to attend, they can change the name on the ticket to the person who will be attending. This can be done via the MyOrder environment of the order.