What is important, gbcdoj, and what you Latins always seem to ignore, is that the Immaculate Conception or the Filioque were not accepted by the Church officially in the first millennium, regardless of what some individual fathers said at one time or another. Fathers do not make pronouncements for the whole church. Only the Ecumenical Councils do. Fathers speak for themselves; they are not inspired and infallible.
As far as the undivided Church was concerned, neither was the Pope the Patriarch, nor was there Immaculate Conception, nor Filioque, nor indulgencies, etc. no matter what some fathers said.
Might I point out that neither was the distinction between God's essence and energies - dogmatized for the Orthodox by the Palamite synods in the fourteenth century? And I think a good case can be made for official acceptance of the filioque based on the approbation of St. Cyril's second synodical letter by the Ecumenical Council of Ephesus (this was a key argument of Traversari at the Council of Florence).
At any rate, I think +Photius can safely be trusted to be free from the taint of Augustine's doctrines, and he apparently had no problem with the Immaculate Conception.