Just spoke to the race director, he was aware that the last mark was well offshore from where it should have been, but was only made aware of this after it was too late.
So it was where it was due to a mistake... he did indicate that in previous years it was a bit closer to shore compared to where it should have been, and this year it was too far offshore.
He's got no way of knowing who rounded it, and indicated that people wouldn't get disqualified if they didn't round it.
Of course if you're one of the top ten then it would be pretty obvious if you took a short cut... but then again if you're in the top ten you've got a helicopter to follow!
I'm amazed at how well organised the whole thing is, and the way that they can say for certain that all sailors have been accounted for. I tip my hat to all the organisers, job well done