O'Rourke said statistics show referees are making fewer game-changing errors than in seasons past, but believes those mistakes are being magnified amid pressure to win in a tight table.

The A-League boss believed it was important to "re-set the expectations" of frustrated coaches, whose relationship with officials hit boiling point after controversial decisions impacted all four fixtures over the weekend.

But he denied pressure was mounting on FFA's director of referees Ben Wilson, whom he says believes this season's officiating is "as good as in the last five years" apart from a couple of decisions.

"Clearly we've made a few mistakes, but the thing I've noticed is the amount of reporting and amplifying of the mistakes we're making," O'Rourke said.

"His (Wilson's) view is that there's some things we need to work through to get out of the human element of the game, some things we're all looking forward to just before the finals series which is technology to assist some of this refereeing." O'Rourke said.

"But all in all, we believe the standard of refereeing is the best we've had in the A-League and we'll continue to improve it."

Unlikely to agree is Central Coast coach Paul Okon, the latest of a string of coaches to speak out against the standard of officiating on Sunday.

Four managers have now earned FFA's ire for outbursts less than a third of the way through the season, with Adelaide coach Guillermo Amor's one-game touchline ban on Monday following Kenny Lowe's two-match ban, Kevin Muscat's fine and Tony Popovic's citing.

O'Rourke claimed the storm didn't reflect the actual statistics, which before last weekend's controversies showed 11 errors in "key match decisions" from the opening 30 games - an improvement on the preceding four seasons.

He said those errors included not red-carding Western Sydney's Brendon Santalab for his scything round-two tackle on Adelaide's James Holland, David Carney's round-five handball goal for Sydney FC, some incorrect offside decisions against Wellington and a missed penalty for the Wanderers following Jason Geria's round-six foul on Jumpei Kusukami.

"Clearly we've made a few mistakes, but the thing I've noticed is the amount of reporting and amplifying of the mistakes we're making," O'Rourke said.

"I think a large part of this - and I'm not condoning anybody's behaviour - is that the coaches believe they have the right to win every game and that every team is beatable.

"And there's a lot of pressure on the coaches, which I understand, to get decisions and move north on the table.

"I think it's feeding on itself a little bit as well, which is not good.

"The best thing to do, is rather than play this out publicly, is just go and re-set the expectations with each coach about what we would expect."

FFA's long-term plan is to increase the number of professional referees from the three existing, Jarred Gillett, Shaun Evans and Chris Beath.