I booked an e-ticket on expedia for my father. He was to travel from Michigan to Arizona to visit my family and I. When I checked back with expedia to see if the ticket had been confirmed, there was a note on my account that said there were no longer seats available on that flight. There was also a box that gave the option "would you like to search for new flights?" Obviously with dads vacation date approaching I did need a new flight if there were no seats available on the previous. So I searched and searched and found a similar flight on expedia and booked it. Another box popped up upon booking that said "this flight will replace the existing flight in your itinerary, would you like to continue? yes / no. I clicked yes thinking that this flight would replace the previous flight/ WRONG! A few days later I recieved an email stating that the first flight had been confirmed!! I thought, well, I guess someone on that flight cancelled and they got Dad on it after all. I thought then that the second flight would be canceled out. Beacause you obviously can't have the same passenger on two different flights, with very similar times, and exact dates. Until a couple of days later, when I recieved an email stating the second flight had been confirmed also. And my credit card had been billed for both tickets. I called the expedia customer support number and explained what had happen thinking they would reimburse me for one of the flights. WRONG AGAIN! They told me it was up to the airline to reimburse me and that they would call them to see if they would. So was put on hold for a very long time just to have them come back and say the only thing they could offer me was airline credit minus a $150 cancellation fee. Cancellation fee? Why do I have to pay a cancellation fee if the only reason I booked the second ticket was because expedia told me the first was full? The only thing expedia would do to compensate the $150 is to give me a $200 voucher for expedia.com on a hotel or car rental. I don't need ahotel or car rental. And if I did I sure wouldn't book it through expedia. The customer support was awful. They kept saying things like "sorry thats the airline policy." Well expedia made the mistake so expedia should make it right. But they won't. So now I am left with a few hundred dollars of airline credit(that has to be used within a year of the original purchase date), a $200 expedia voucher I won't use, a huge credit card bill, and a horrible headache. NEVER USE EXPEDIA!!! THEY ARE TERRIBLE TO DEAL WITH. THEY CALL IT CUSTOMER SUPPORT AND NOT SERVICE FOR A REASON- THEY ARE NOT THERE TO SERVE YOU!