1. The quantity is based on the Ticket Purchase Method selected.  if they book per ticket, then they can book 1 per ticket. 
2. If they book by Day / Show then they would book by event so 1 event is correct two. 
3. If the ticket purchase method selected is per ticket price than the qty relates to the individual person and ticket. 
4. If the Ticket Purchase Method selected is Per Event, than the qty relates to a per event.  Proceed to select the number of shows per day and the number of days.