I think it's close to normal. I ride at about 118 in the rear tire and 110 in the front and my wife rides at 5 pounds less than that due to her lighter weight. We'll lose 10 pounds in the first day, then 5 the second, and gradually lose less and less with more time. I always top off our tires immediately before each and every ride. It's easy to damage a presta valve by tightening it too much. All you need to do is snug the nut down to keep the dirt out. The pressure inside the tire should keep the valve closed.

Al