I completed one Ready-Go and the time remaining was 7:28:00. However, I did notice that the ready-gos are up but also notice I can signup for the same type of ready go before the tournament ends. I think this is a glitch. Note, I did not signup for that ready-go.
Addendum:
The playing conditions from the previous ready-go to the current ready-go are different. Thus one can sign up for the same course as long as the playing conditions are not the same.