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I missed his previous comment, but there is nothing to fix. The problem is nothing more than that he doesn't understand how the notation for the game works. Here's a telling comment of his from the movelist for that game:

9. N !D7-c7 
// Hi. Listen, I think maybe this preset might need a little
// bit more work to become fully enforceable because it doesn't
// appear to allow me to move your knight out of hostage
// territory even as I rescue mine. It's miraculous how it
// automatically enforces some of the rules. Unless I'm doing
// something wrong, it needs work on some other aspects of the
// rules.

The move he has written moves the Knight directly from the prison to the board, which is illegal. Judging by his comment, he expects the preset to automatically exchange Knights when he tries to drop his Knight on the board. If he tried 'N*c7' and it didn't work, this is because the Knight is still in the prison, not in the airfield. The preset will not automatically exchange pieces when you try to drop a piece from the prison, because it can't always know which piece you wish to exchange for your piece. Therefore, the exchange must be made explicit before dropping a piece that is still in prison. The legal notation for the intended move is 'n-N; N*c7'. I tested it by substituting it for the original move, and it worked as it is supposed to. Details on the notation for this preset are given in the Notation section, which you will see if you just page down the preset a bit.