Regarding the antiquity of the Marian doctrines we must be cautious. White mentions J.N.D. Kelly, his Early Christian Doctines, I refer you to his chapter 18. I would accept that the cult of the Virgin was on the "fringe" of the Church in the late first and second centuries and overshadowed by the cult of the martyrs but is evidenced in certain aprocrypal words, especially the Proto gospel of James.By the 4th Century we have a very different picture although not a modern one. If you want to know my views on the development of doctrine,and the role of the papacy, I suggest you do read Newman
Regarding the opinions of "fathers" at variance with later Church teaching, the question I ask you is whether you are willing to let ANY authority decide between contending positions and THEN and ONLY THEN rule out other opinions, or do you insist on evaluating the fact situation and rendering a judgement yourself?