I know Catholics believe it is a true apparition of Mary, but since there were many things in there that go against the word of God, it CAN'T be or God, much less Mary.
If any of the Protestant or Catholic sects are correct, then the number of saved will be in the thousands at most.
You don't seem to get it.
No one church is 100% correct. No one church is the *one, true, church*.
Salvation is independent of church affiliation. One is not saved by church membership, or baptism, or anything else religious. Salvation transcends denominational lines because it's faith in Christ that saves, not faith in any church.
Church is a fine thing as far as it goes, but it is NOT essential to salvation, either getting saved or staying saved.
I agree, as do all Catholics. What all Christians disagree on is what is meant by "faith" in Christ. What orthodox Christians demand is a proper faith in the true Christ. What lots of people have is a defective faith in their own mythical version of Christ.
Unfortunately Christians of goodwill (Catholic, Protestant, and Orthodox) disagree on the definition of 'proper faith'. So even if you completely discount church affiliation, if you have a strong set of well-defined beliefs, then you can be sure that those beliefs are shared by very few other people. There are many important an currently unresolvable differences between Catholics, Protestant, and Orthodox but there are also great divides among the Protestants especially with regard to those who have Calvinistic beliefs and those who find them abhorrent.
In the end, it seems as if all "true believers" end up in the same place as the Calvinists with just a few of the elect ending up in Heaven and the vast majority of beings made in the image of God damned to Hell for eternity.