Trid, please read this explanation from an excellent source:

"In this [Orthodox] Church, there is no authorized listing of all the truths on faith and morals in a formulated system, nor an official catechism which encompasses all the truths. The Church leaves teachers and thinkers of theology free to constantly study and present the existing truths of the revealed Word to cope with human needs and circumstances. Orthodox theologians are free to further study various subjects in greater depths, achieving a greater perspective from which to interpret the truths of the Church for the steadfastness of the faithful."
http://www.goarch.org/ourfaith

I hope this clarifies things for you.