The seat is not really made to sit up in, the below was taken directly from their website. The Prologue is a better choice if you get up in the saddle.

Similar to the other Performance Short seats (Time Trial, Road, Typhoon), the Racing II is best for riders that prefer to stay in one position on the seat, without moving fore/aft very much. This makes it a top choice for triathletes and time trialists who ride in the aerobars, or for flat courses in which the athlete likes to ‘settle in’ to one position and go.