Gold Coast's season from hell just got worse, with referees' boss Tony Archer admitting Newcastle should not have been awarded a crucial try in the 20-18 win over the Titans.

Archer also said a try to Knights centre Dane Gagai should have been disallowed due to a Korbin Sims knock-on in the lead-up to the four-pointer.

Contentious: Steve Matai heads to the line for Manly on Friday. Credit:Getty Images

He also said Manly centre Steve Matai's try should not have been allowed in their loss to the Bulldogs, but said the call to Blake Austin deny the Raiders a near unbeatable 22-point lead was correct.

The decision comes after six players were charged by the match review committee.