If you are a Bank of America customer, It would probably be a good idea to stay away from Apple Pay for now.
BofA was smart enough to refund me the money, because they said it was obvious to them that these were duplicate charges for the same exact amount. "We're aware of a Bank of America issue impacting a very small number of Apple Pay users," an Apple spokesman said. "They're working on a fix that will be available shortly and reversing any duplicate transactions."