A Priest may not break the seal of confession…
Some priests may remember…some may not…but this has nothing to do with their acting in persona Christi …
Nor does such mean that what a Priest may say is from God…
hence as you say they can have different opinions…
But when a Priest validly absolves a rightly disposed penitent…their sins
are absolved…
CCC
1548 In the ecclesial service of the ordained minister, it is Christ himself who is present to his Church as Head of his Body, Shepherd of his flock, high priest of the redemptive sacrifice, Teacher of Truth. This is what the Church means by saying that the priest, by virtue of the sacrament of Holy Orders, acts in persona Christi Capitis:
Code:
It is the same priest, Christ Jesus, whose sacred person his minister truly represents. Now the minister, by reason of the sacerdotal consecration which he has received, is truly made like to the high priest and possesses the authority to act in the power and place of the person of Christ himself (virtute ac persona ipsius Christi).
Christ is the source of all priesthood: the priest of the old law was a figure of Christ, and the priest of the new law acts in the person of Christ.
875 “How are they to believe in him of whom they have never heard? And how are they to hear without a preacher? And how can men preach unless they are sent?” No one - no individual and no community - can proclaim the Gospel to himself: “Faith comes from what is heard.” No one can give himself the mandate and the mission to proclaim the Gospel. The one sent by the Lord does not speak and act on his own authority, but by virtue of Christ’s authority; not as a member of the community, but speaking to it in the name of Christ. No one can bestow grace on himself; it must be given and offered. This fact presupposes ministers of grace, authorized and empowered by Christ. From him, bishops and priests receive the mission and faculty (“the sacred power”) to act in persona Christi Capitis; deacons receive the strength to serve the people of God in the diaconia of liturgy, word and charity, in communion with the bishop and his presbyterate. The ministry in which Christ’s emissaries do and give by God’s grace what they cannot do and give by their own powers, is called a “sacrament” by the Church’s tradition. Indeed, the ministry of the Church is conferred by a special sacrament.