Here's one of your problems. The Magisterium is the "teaching authority" in the Church. Not the teaching authorities themselves as men. The Curia does not equal the Magisterium. The Curia invokes the Magisterium. The Magisterium is perennial. The Curia is temporal and changing. Every statement out of the mouth or pen of the Pope is not the voice of the Magisterium. But when the Magisterium speaks, it speaks through the voice or pen of the Pope and those in communion with him. But only when he himself is in communion with the Magisterium of the Church.
But only when he himself is in communion with the Magisterium of the Church.
you're implying that at times, Peter does not loose what is loosed in heaven, nor bind what is bound in heaven on matters of faith. Because, if you're saying it's even POSSIBLE that Peter can be out out of communinon with the Magisterium, then that throws doubt on the entire Catholic faith from Day One - and if that's the case, then the Church is a fraud, and Jesus was a liar.