So my parents each got saver awards US to Hawaii. So 2 seats at 45K each total of 90K + $22.40 in taxes. The route is EWR-IAH (3/7) (stopover in IAH) and IAH-LAX-KOA (3/8) then HNL-LAX-IAH-EWR (on 3/14 into 3/15). The reason for the wacky routing is they are meeting up with my 13 year old niece to take her to Hawaii in IAH (She's on a separate res, but the agent has connected them so no UM fee has been charged). Anyway, I found a better routing and went to see what it was price out as. I start the change on UA.com to do EWR-IAH-SFO-KOA on 3/7 and then HNL-IAH-EWR (on 3/13 into 3/14). The system says old fare 2 tickets for 90K, new fare 2 tickets at 90K plus $200 for change fees, it then says 105K will be refunded and I owe $200. How can this be right? Even if the miles get redeposited and then are used to pay for the 90K award tickets, that still has me netting 15,000?? I'm a bit confused.