You mean, that Jerome's Canon did not have the Deuterocanonicals in his proposal for the OT. The apochrypha are something entirely different, such as 3 and 4 Maccabees, or the Prayer of Manasseh. He was one of the few. The Church did not accept his Canon. Therefore Jerome came over to Church beliefs, not vice versa. You state vast majority without source and Middle Ages. Jerome was a contemporary of Augustine and was present when the matter of canonity was settled in 393 (Hippo) and Carthage (400). When Jerome published the Vulgate in 406, it contained ALL of the Deuterocanonical books that the Church holds to be Canon today.
Pope Innocent I in Consulenti Tibi (dated February 405) to St. Exuperious (Bishop of Toulouse) listed the Canon of Scripture that the Church holds today. One must separate the Deuterocanonicals from OT Apocrypha, and the NT Apocrypha from the OT. For example, the Gospel of Thomas and the Revelation of Peter are considered Apocrypha.
When Jerome published the Vulgate in 406, it contained ALL of the Deuterocanonical books that the Church holds to be Canon today.
Some bibles have commentary along side the scripture, it doesnt make the commentary = scripture.
The New Catholic Encyclopedia actually affirms the fact that the Canon was not officially and authoritatively established for the Western Church until the Council of Trent in the 16th century and that even such an authority as Pope Gregory the Great rejected the Apocrypha as canonical:
"St. Jerome distinguished between canonical books and ecclesiastical books. The latter he judged were circulated by the Church as good spiritual reading but were not recognized as authoritative Scripture. The situation remained unclear in the ensuing centuries...For example, John of Damascus, Gregory the Great, Walafrid, Nicolas of Lyra and Tostado continued to doubt the canonicity of the deuterocanonical books. According to Catholic doctrine, the proximate criterion of the biblical canon is the infallible decision of the Church.
This decision was not given until rather late in the history of the Chruch at the Council of Trent. The Council of Trent definitively settled the matter of the Old Testament Canon. That this had not been done previously is apparent from the uncertainty that persisted up to the time of Trent (The New Catholic Encyclopedia, The Canon)."
Some have suggested that Jerome later changed his opinion and included the Apocrypha in the canon of the Vulgate. However, there is no evidence to support this. Jerome continued to write commentaries on the Old Testament books until his death. There is no record that he ever retracted his original statements about the Apocrypha. In his work, Against Rufinus, written in AD 401-402, he reiterated and defended his earlier position on the Apocrypha. Again, his comments come after the North African councils. Though he did not consider the Apocryphal books to be canonical in the strict sense, Jerome quoted from them in accordance with his own convictions, for the purposes of edification. http://www.christiantruth.com/articles/Apocryphapart2.html