Join Date: Dec 2003
Location: Redondo Beach, CA USA
Programs: UA 1KMM, Bonvoy LTE+A, HH D, Nat'l EE, Hertz Plat, Avis PC
Posts: 3,712
Are you sure that when you hit the back button and then proceeded again, it didn't assume you were buying a second ticket (so, two tickets total thereby doubling the miles)?