AFL umpiring coach Hayden Kennedy has counted as many as 12 errors — well beyond the league target of 8.5 this season — in the contentious Port Adelaide-Carlton game at the MCG on Saturday.

But of all the controversial issues — such as Port Adelaide midfielder Sam Colquhoun being denied a mark in the last term and Carlton swingman Lachie Henderson being handed a mark on a bounced ball in the same quarter — Kennedy is listing only one call as a howler.

The umpiring sparked outrage among Power fans, and a compilation of the decisions has appeared on YouTube, below.

Kennedy says umpire Matthew Nicholls’ decision to give Carlton onballer Dennis Armfield two shots on goal in the second term — after he took advantage to play on with the first and missed his shot at goal — was incorrect. Armfield scored a goal with his second kick.

Kennedy is accepting the umpire’s call to not award a free kick — nor report — in the Bryce Gibbs’ tackle that put Power midfielder Robbie Gray out of the game before half-time with concussion. The incident is before the AFL match review panel.

Port v Carlton - umpires in the spotlight

Kennedy says the umpires are told to penalise tacklers who “lift a player and make a second motion” to push the opponent into the ground.

“The umpire did not see any of those cues,” Kennedy said. “But we will look at all the different (video) angles.”

Kennedy was the AFL umpiring observer at the MCG on Saturday. After a four-and-a-half video review of match, he has found as many as 12 errors.

“And that is without consultation with the umpires,” he said.

The average error rate last season was 9.1. The target this season is 8.5.

“I’m not surprised,” Kennedy said of the higher error count on Saturday. “There were a few things that happened that came from left field (such as an umpire marking a ball kicked by Port Adelaide midfielder Hamish Hartlett).”

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Originally published as Video: Too many umpire errors in Port-Carlton match