tuppence, all of this was covered with RomeSweetHome before and he simply ignores it and quotes the Catholic Church. Have you noticed how Catholics bend over backwards to show the Bible is both incomplete and errant?
Why bother to believe a common sense understanding of the Bible when you can so confuse people with rhetoric and tradition the Bible becomes nothing more than a book to be read in light of the catechism.
There is no use being logical and asking logical questions. It is illogical to see the Pope being given the care of Mary, it is logical (at least to a Catholic) to see what they want to see in the Biblical account of the crucifixion.
Appealing to Adam as the source of sin is not going to change a Catholics mind since they attribute a part of the fall of man to Eve and then paraphrase Biblical teaching about Christ being the second Adam by teaching Mary is the second Eve. Adam and Eve did not have a mother but that is beside the point; to a Catholic.
The Ark of the Covenant did not birth the Torah or the Old Covenant, the Ark was both a storage facility and the location of the mercy seat. Mary is neither. So again don't be logical with a Catholic they don't like logic.
One question no Catholic I have asked this of can explain why Joseph and Mary went to Bethlehem to be counted in the census, but no other children of Joseph accompanied them, and no child of Joseph went to Egypt. So either Joseph out lived his contemperaries by a considerable length of time or the Catholic Church is building fables to establish a false doctrine.