The 'Damasian List' is found in a spurious document called the 'Gelasian Decretal' which likely dates to somewhere around 600AD, and has no historical value whatsoever.
The Council of Jamnia nonsense has long been put to bed, and Graetz is long dead.
Stopped reading right there, as a document that relies upon such gibberish is hardly to be taken seriously.
There was no Jewish canon because there was no concept of canon. The Jewish 'Canon' was the Torah. The approved prophets were secondary, and the approved writings were tertiary... And the prophets and writings were in flux.
However, the Masoretic Texts, when they did become canonized, were thought to be a close representation of the Temple collection - And the Dead Sea Scrolls prove that out, being 65% proto-Masoretic in origin. Incidentally, the Alexandrian tradition (read: Septuagint) is reckoned in single digit percentages within the DSS collection, far below even the Babylonian tradition and the local writings of the Qumran community.
Using Wikipedia as a source impedes your own arguments.
Stopped reading right there, as claims that rely on such irregular pseudo-scholarship can hardly be taken seriously.