How can they score in the fourth round if they are all marked "MC" after the third?
Hopefully the OP can post a pic of the scorecard showing the facts.
This probably fits into my observations here.
Edit:
The leaderboard is accessible through Brick's score history. He was the only player to post a valid score in the third round and was subsequently excluded from the fourth by MC.
IMHO this is another indication of the programming fault which excludes the ties with the cut line rather than letting them play on.
Special outcome here that "the last man standing" was excluded and the tournament purse forfeited, which certainly is not correct by WGT.
IMO the purse should be payed to Brick, or the fees should be payed back to all entrants, including those not shown on the leaderboard because they may have withdrawn or not played in the first round.
Who they are? We can't tell but WGT hopefully can.
WGT gives me a strong point that transparency has been lost due to the modification to show first round WDs and NPs as "not entered".