Who made, after an "exhaustive" process, the Saints you pray to?
Has any person ever been declared a Heretic and subsequently decrared a Saint?
Has any "Saint" ever been stricken from the roll of Saints?
MEN, not Jesus were the ones involved.
You mean like Joan of Arc?
Who made, after an "exhaustive" process, the Saints you pray to?
I guess I'm not following. Sainthood is between that person and God. The Church tries to figure out which individuals that are saints, but the Church does not 'make' one a saint any more than the Church makes one saved.
Has any "Saint" ever been stricken from the roll of Saints?
A handful, sure.
MEN, not Jesus were the ones involved.
Let us not confuse the being of sainthood with the role of the Church trying to figure out if one is a saint or not. That is like a judge of a lower court finding someone guilty or not guilty and then a higher court reversing the decision of that finding. A conviction in a court does not mean that I actually did something or not; it means that the court thought that I did that something or else it couldn't be proven.
The Catholic Church does not make saints, it merely recognizes some. The listing is neither complete or infallible.