"It wasn't declared dogma yet was it? Thought that and Papal infallibility were declared such after Marian apparitions in the 1800s"
That was my point. When Luther was sermonizing, there was no Feast of the Immaculate Conception. It was called the "Feast of the Conception of the Most Holy Theotokos by St. Anna" The Latin position would be that the 1800s' dogmatic proclamations on the Immaculate Conception and Papal Infallibilty were merely papal affirmations of what The Church always and everywhere believed. When they were proclaimed, Rome knew Orthodoxy didn't accept those notions, but at that point in time, Rome was of the opinion that Orthodoxy was not part of The Church whose boundries were co-extensive with the bishops in communion with Rome only.
Caution, I have not had my coffee yet. This is a side note: WHen I did Aquinas on the Sacrament I seem to recall that he acknowledged the validity of Orthodox orders. So whatever we thought of you, I'd venture to say that we didn't think you weren't in the sho' 'nuff Church. Or maybe Aquinas wasn't representative?