You are correct, there was a transcription error on the second formula, it should be:
(0.72 * 0.5 * 0.53) + //lose first, win next two
(0.28 * 0.5) + //win first two
(0.28 * 0.5 * 0.53) //win first, lose second, win third
Basically, I modified the wrong value on the third line. Anyways that...