Have a round trip scheduled to EWR this weekend. Had to change my flights from Sunday to Monday. When I went to change the flights online at UAL they wanted 15,000 miles for the new flight. When I did the new flight as a one way it showed up as 10,000 miles (and not logged in). I then booked it as a one way reward trip that I logged in for and got the 10,000 miles. Is there now a penalty for changes for Elites?