There is no need to sign up for this round, as it is round 2 of a series.  If you can play for the entire 3 rounds of the series, you only need to sign up in round 1 (June 11).

This is round 3 of a 3 round series of the Summer Cup. There is no need to sign up for this round individually.  If you can play all 3 rounds, sign up for the first round (June 11) and you will automatically be signed up for June 14 and 18 as well.