Isn't this contridictive to our belief as well as not biblically supported? HELP?

Mormonism does not and never has been in a communion with the Christian family. Protestantism, Orthodoxy, and Catholicism all have ties in Baptism and Matrimony that bring us into a unity, if only loose. My immediate reaction would be to start looking at CAF, Catholic answer forums, and ask questions there under non-catholic religions. Your faithwalk needs to start in a nurturing environment, and there isn't a much better place (except in person with a priest) than there.