"If" they had a mark boat at the last mark / gate before the finish, they should have been keeping an order of rounding sheets. Not too difficult in light air and 14 boats. Those could have been used to determine positions 9 - 14.

Given the alternative (everybody gets a 14), most people would take what they had at the last mark.

My guess is they didn't have that level of organization. Really lame at a national championship.