The FA and the Professional Game Match Officials Limited – which is the referees’ body – have launched investigations to find out how Wednesday winger Helan was booked twice but not sent off.
But referee Mick Russell had wrongly noted down Helan’s team-mate Michail Antonio for the first booking and failed to spot the error.
Helan admitted: “From a personal point of view, I was just happy to complete 90 minutes.
“I do not know what happened with the bookings. That is the referee’s decision and you would have to ask him.”