Not at all. One would just have to believe that the writings and the oral traditions both draw from the same source--the inspiration of the Holy Ghost. Truth can never contradict itself.
The apostles wrote and preached the same exact things--the difficulty you are having is that you are attempting to understand what they wrote outside of the context of what they taught. That's why it seems contradictory to you.
But I really wanted you to answer my other question, post 229--how do we get from God deciding the canon, to man knowing what that canon is and putting it together?
Well, then you need to explain why your cult teaches you to pray to idols, because there is NOTHING in the Bible about Jesus or any Apostle "venerating images" or teaching anyone lese to do so. There is NOTHING in the Bible about Mary being anything other than a normal sinful human being like all the rest of us, who needs a savior.
Writing the Books of the New Testament
Date and author. By about A.D. 100, all 27 books of the New Testament had been written, thus meeting the need for a permanent record of the gospel. Either Apostles or men who had an extremely close relationship to an Apostle wrote the books of the New Testament under the inspiration of the Holy Spirit. The Holy Spirit fills all believers, but the Apostles received unique power to carry out their assignment from Jesus. The Holy Spirit taught them all things, and caused them to remember all that Jesus had taught them (John 16:12-15). Thus, books that measured up as works of the Apostles were regarded as the very Word of God, for they established a permanent connection between Christians of all ages and the Apostles, setting a standard for Christian belief and practice. Many writings of men who lived during the time of the Apostles contain references or quotations from books of the New Testament. The Bible: God's Inspired, Inerrant Word