Neil Henry said he was as confused as anybody after Gold Coast Titans ended up with 14 men on the field against Canberra Raiders.
Gold Coast Titans coach Neil Henry said he was oblivious to the fact his side had 14 men on the field for a brief time in Saturday's NRL win at Canberra Raiders.
The NRL is set to investigate why the Titans ended up with a one-man advantage during the second half of their dramatic 24-20 victory at GIO Stadium.
David Shillington was due to come on in place of Tyrone Roberts eight minutes after the break, but returned to the sidelines soon after.
The Titans will wait to discover if any action is taken after watching his side storm back with three late tries to stun the Raiders.
Henry said: "There was some confusion there. The interchange official is supposed to not hand the card over until that player is off.
"I don't know if Tyrone Roberts is off the other side [of the pitch] or not, but it cost us an interchange anyway. Why would it have cost us an interchange if they handed the card over, surely something has been decided?
"I'm not sure, obviously the match officials will take a look at it and see what happens.
"When I saw Shillo [Shillington] go on and then Tyrone went off the back I reckon he was on there about five seconds so I think they realised he wasn't off the other side.
"The interchange guy is supposed to sight it as far as I know and that didn't happen,
"I wasn't watching that play at the time, so I wasn’t sure what was going on."