EBU teams qualifier. All four players of a good standard. 2NT was alerted and according to the system file, natural, but North thought it was two places to play. South did not alert 3D, which was systemically a transfer to hearts, as he "thought this would help his partner". NS were able to show that 3NT over 3D was, typically, 1-2 hearts and a desire to play there. South also failed to call the director after the final pass to state that "in his opinion, there was an incorrect alert of 2NT". He was not aware that this was the rule.
West led a top spade, and declarer won with the ace, played a diamond which West ducked and then finessed the club. West continued spades and so the contract made. The TD stated that he polled a number of players and one seriously considered bidding 3H over 2NT. He adjusted the score to 3H-4. Do you agree with the ruling?
[Thanks for fixing, mods; I have clarified that 2NT was alerted]