If you had a bet voided after the first round was restarted you might want to check the rules as you may have backed a winner. I backed Thomas in his 3 ball with Tiger and Rory layed Tiger in the same 3 ball. Betfair voided them incorrectly. They finally paid up today after attempting to claim all bets were void because of the restart. The relevant part of their rules is as follows:
If a Tournament/Round is restarted from the beginning, all bets placed after the official off time will be void, except on markets which have been unconditionally determined, which will stand. Bets on 2 or 3 balls will only be void if matched after the tee time of the relevant 2 or 3 ball.
You might want to get in touch with them if you backed a winner in the afternoon scheduled 3 balls and then found it had been voided