Intervention of the Holy Ghost in response to what? Himself? You forgot the part where the Holy Ghost is the author of the Council.
So, after the promulgation of the Council and before the addition of the note we had the Church teaching unacceptable heresies but afterwards it's all good?
Insane.
And this is all on your false premise that the note means you can throw out anything you want. IT DOESN'T!!! IT IS SUPPOSED TO MEAN THAT EVEYTHING INSIDE CAN BE RECONCILED WITH TRADITION USING MODERNIST MENTAL GYMNASTICS/EVOLUTION OF DOGMA.
The note is there to keep the gullible traditionalist tied to the Vatican II sect, its fake pope, fake doctrine and its fake sacraments.
In an Ecuмenical Council, the Holy Ghost is the Author of the infallible pronouncements therein. Vatican II does not contain a single infallible pronouncement. In fact, both conciliar popes explicitly stated, 'We will not define anything in this council'. Consequently, I cannot even see how Vatican II could possibly be a Council (capital 'C').
Paul VI inserted the Note into the official council text during the sessions. It is officially part of the text, not just a sticky note stuck on afterwards.
Read the relevant passage again, "...the sacred [sic] council defines as binding on the Church only those things in matters of faith and morals which it shall openly declare to be binding". As there is no such instance in the entire collection of docuмents, this passage means in plain English, "Throw out whatever you choose in these docuмents".
Interpreting that line in the way you did in the capitalized section of your post ironically involves Olympic-level mental gymnastics to say the least.