I'm beginning to become very annoyed with that happened now that I have some information gleaned from other referees higher up the chain than me
Firstly, an Australian referee acquaintance of mine had a guest speaker at their referee meeting in Sydney this week. The speaker is a current Super Rugby referee and test AR, and he said that the word from WR was that the decision was wrong; advantage should have been played and then if no advantage it and should have been a PK under 11.7 (their opinion is that it was a knock on).
Secondly, the transcript of what the officials said to each other tells me that not only did they make a complete pig's breakfast, of the decision, it was actually Jerome Garces who convinced Poite to change his mind.
After Poite went to the TMO...
TMO: "Romain, they are all the angles."
Poite "Are you happy for the knock-on? Is the challenge in the air fair? And a penalty kick against 16 red for being in front?"
TMO: "Yes I am."
...at this stage, Poite is going to award a penalty to NZ for offside, but Poite gets a call from Jerome Garces.
Poite: "Oui, Jerome."
...and they converse in French (more about this later) after which Poite walks back to Read and Warburton.
Poite: "We have a deal, we have a deal for the offside from 16. He didn't play deliberately at the ball, okay? It was an accidental offside."
So, what did Garces say to Poite? We know that Poite changed his mind after speaking to Garces, and not everything they said was heard, but one thing was, and it is damning..
"Vous savez ce qui est arrivé à Craig. Ne faites pas cela à votre sujet." (You know what happened to Craig. Don't make it about you)
If that translation is correct, then that is very unprofessional of Garces. He has brought in something from another game, totally unrelated to this game, in order to convince another official to change his decision. Both these referees need to be called to account for that.