I Booked 3 Tickets On Delta.com For 133.00 Dollars Each. I Also Booked 3 Tickets On Southwest. The Total Amount For Southwest Has Been Charged To My Credit Card. Delta Only Charged My Card For 133.00. I Called To Check And 3 Tickets Have Been Issued. Do They Only Charge For One And Charge The Rest Later.? Seems Odd Since The Ticket Have Been Issued Already.