Ahhhhh…rightlydivide…you have all of your information mixed and bunched up in a ball and once again are adding to the text. The fact that the patristic writers held to the ‘traditional’ who by the way lived AFTER Christ does not support or prove that the Jews had a FIXED canon prior to Jesus. They are not arguing in your favor and saying,“I see the Jews already had a fixed canon prior to Jesus and it is conclusive.” No!
If it was FIXED as you believe and if that were the case,then why would Jude cite two apocryphal sources in his letter? Even my NKJV Study Bible discusses this issue.
The issue here is that you alone believe the Jews FIXED it before Jesus even was born…that is the issue,not the view of the church fathers about the traditional Jewish canon.
Now,tell me WHERE did it happen? Jerusalem? Tel-Aviv? Ashdod? Hebron?
WHO made such the decision to FIX it before Jesus was even born? The Sadducees? The Pharisees? The Essenes?