There’s no way to add two players to a section after it’s been rated, just like there is no way to add a section to an event after it’s been rated.
Neither of those are something that happens often enough to write a module for that, probably less than once a month, so how we handle those occasional situations is to delete the entire event and resubmit another event with the additional players or sections in them.
The decision as to whether to put it the ‘extra games’ section or in the Open Section is one that was apparently made by the organizer, not the TDs.
That wouldn’t have affected the way it needed to be processed yesterday, adding players to any section or adding another section both require that the old event ID be deleted and replaced with a new event ID.