The final contract was 2N x'd by East failing by one trick. After the hand, the players discovered North had 12 and East had 14. The hand record showed the ♥J belonged in the North hand.
Per 13C, I canceled the result, and determined what made what I thought was an appropriate adjusted score.
On the actual hand, NS got active on defense and took the first six tricks: 3♠ + 1♥ + 2♣. Assuming East does not throw away any winners on the first six tricks, East makes the balance: 1♠ + 2♥ + 3♦ + 1♣, so I ruled result stands (plus a PP for both NS and EW for not counting their cards). The ♥J was not material.
Anything to concern myself with here?

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