The figure it out was directed toward USSSA as a whole. Don’t hold sponsors to standards & not your staff.
The people saying “Reverse the roles” are absolutely correct. And 15 minutes after the time If very incorrect as well.
If the game in front of them was over so far in advance, as a director (not you) they should be making a call to BOTH teams coaches asking them to be there ASAP because they want to start the game sooner than the 30 minutes prior.