Such is the difficulty of not having editors, or the ability to fix a post once you've made it: I'm sure there must be some honest discussion of the canon out there, somewhere.
Also of note: if you read “But it is better to decide to displease the opinions of the Pharisees and to be subject to the commands of bishops” as merely saying that the bishops said it was the canon, but it was not, then you’ve established that St. Jerome is denying sola scriptura by this statement.
Thank you for your honest statement. When there is doubt we should lean on the Words of The Good Shepherd:
Luke 24:
44 And he said to them, “These are my words that I spoke to you while I was still with you, that everything that is written about me in the law of Moses and the prophets and psalms must be fulfilled.” 45 Then he opened their minds to understand the scriptures, 46 and said to them, “Thus it is written that the Christ would suffer and would rise from the dead on the third day, 47 and repentance and the forgiveness of sins would be proclaimed in his name to all the nations, beginning from Jerusalem.