Mary is a prime example of faith and obedience to God. She holds a unique place and function in the plan of God and the Incarnation. She should be honored accordingly. However, Concerning your statements below…
God confirmed that the Virgin Mary is sinless,
Then God contradicts Himself. For He said through the prophet Isaiah that none sought after Him, and that all had gone out of the way. Even Peter says that all we like sheep have gone astray. That includes Mary, and every other single person born of Adam.
That is the context of the all of Romans 3:23 – all those born of Adam. The one and only exception to that is Christ via the virgin birth.
She was also conceived without original sin.
Then she needed not salvation, and humanity needed not a Savior – for mankind, via Mary, had already attained sinlessness before God both in nature and in conduct or attitude.
She is also in heaven, body and soul.
Really? Care to share any NT passages that confirm this?
No, she is not bodily in heaven, but she, as all believers who have passed, is dead in Christ and awaiting the resurrection and subsequent transformation of the vile body like unto His glorious one.
God also confirmed these truths, though the legitimate teaching authority of the Church.
God gets accused for a lot of things in the name of religion and conviction.
She is blessed indeed, as she said.
Indeed, as she ought to be for her role in the incarnation. She indeed was blessed above all women, in being chosen for that honor of carrying and giving birth to the incarnate deity.
However, even Jesus said that those who believe the gospel are blessed more than the mother whose paps gave Him suck.