Biz plat. Had to change 2 United award tickets and was charged 2x $100 change fee plus additional taxes (approx. $30/ticket). Charges showed up as 4 separate line items on the Amex account ($100, $100, $30, $30). A few days later, the $200 credits posted but not as $100 and $100. Credits showed up as $100, $30, $30 and $40.