Two considerations: Over hundreds of years the Church has changed, enlarged, or suppressed many doctrines.  You know some of the examples - slavery, usury, modernism, democracy, etc.  Perhaps more importantly, the Church is the entire People of God, it is not the hierarchy, a group that makes up less than 1% of the members.  NCR expresses the views of the overwhelming majority of the People of God.  Lastly, God helps all souls and desires that not one of them should be lost.