As mentioned in the notes, “Week 1 was generated before the updated August 12th delay. Unfortunately, this means that the default time for the first week is officially set to July 29th. Obviously, this is incorrect.
The default time for Week 1 on ultiduo_grove_b2 is August 12th at 8:00 PM Eastern Standard Time.”
So there was basically a bug with week 1. The scheduler should work fine for week 2. Until then, just use the match comms to organize a time and day to play. Note that it must be before Wednesday