no i am sorry to tell you but you are wrong. 1. no godol is hashems mouthpiece.
While I absolutely believe that we have to respect our gedolim, the notion that they are Ha-Shem’s mouthpiece sounds uncomfortably close to l’havdil what the Catholic church thinks about the Pope. No one is infallible, not even a great Gadol, including Moshe Rabbeinu ZT”L. People err all the time, including rabbis. I had a rov totally change a p’sak he gave me, the day after he paskened a shailah (and the original p’sak was very harsh and I already had followed it, by the time he changed his mind). I deeply respected that he took the time to continue to check out the halacha, but his initial stance was very dogmatic, and he should have not been so insistent on his decision before having checked the other sources that ultimately caused him to reverse his decision.
At no time did I argue the p’sak with him, or give him the impression I was annoyed. I followed it to the letter, it was yes-yes or no-no. But it really messed me up, cost me money, time, and effort, and in the end he changed his mind. People are human, they have bad days, they are stricter,they are more lenient, they understand things differently from other people who have equally intelligent minds. They also can make mistakes. No rov should be such a baal gaivah that he thinks he can never be wrong. I have come across such rabbonim, and they are sometimes chalilah marchik Jews from Yiddishkeit with their black and white way of looking at things. Life is in shades of gray, sometimes. That’s why there are differing opinions and shivim panim l’Torah.