Normally regulations will say 'Finish on the Day' but may not be explicit in terms of how many periods of extra time are required. People expect that penalties would be the final determining factor to get a result. How many periods of extra time could then be left open to interpretation if not completely made clear in the regulations.
Presumably some official at the Junior final got it right, at someone in the senior game got it wrong.
Presumably some official at the Junior final got it right, at someone in the senior game got it wrong.