If you made the cut after Round 1, you are automatically playing Round 2 and there is no need to sign up for Round 2.
In Round 2, you will be paired with others in your flight with a similar score after Round 1 so any requests for early, middle or late will not be honored. This is important since tee times will start at 6:50 and continue until 11:40.
Indexes of 8.0 or less play green/white combo tees (72.1/131/6,402), indexes from 8.1-18.1 play white tees (70.9/128/6,141); all others play yellow tees