I just bought a Race 2 and went for my first pool swim this morning. I had the same issue. Swam 2,150 yards, which were recorded correctly and displayed on my watch. After I saved, the watch changed it to 2,069 yards. If I go into the app and count all the intervals, they total 2,150 yards, but the “total” is still shown as 2,069. Same 3.75% “discount.” Not a great start for a $600 watch.