Just as in English we only say "St." Bede out of laziness when referring to Bede the Venerable, Augustine of Hippo is known in Orthodoxy as "Blessed Augustine."
Are there any other figures in the calendar of movable feasts who have published their "confessions" in such excruciating detail? For my part, I'm not even sure that I would recommend Augustine's Confessions as Church literature at all! The City of God, might be another story, I don't know. I have never read it in full (few do), and it's been a long time since I read any excerpts. He wrote polemics against the Manichaeans too--interesting sect.
But compare those offerings with say, The Ladder of Divine Ascent... Huge difference.
Are any miracles attributed to Blessed Augustine? I mean in the Orthodox Church.