The doctrine has not changed. Here you are (admittedly?) expressing your own bias, not Catholic dogma.
Mrs. Don-o, I have always disagreed with you but have always respected your integrity. Now you are engaging in dishonesty, which is very unlike you.
You well know that I don't subscribe to an evolutionary worldview. I put quotes around "we" precisely because it is Catholics who claim that "new knowledge" has disqualified the historicity of Genesis 1-11 from consideration. I myself have read this very thing in Catholic apologetics aimed at a popular audience. What good does an obscure old encyclical issued in Latin when what it says has been discarded by the vast majority of practicing Catholics?
I ask you again: Was there a Flood? Was there a Dispersion? Were there really ten generations from Adam to Noah, ten generations from Noah to Abraham, and six generations from Abraham to Moses?
Did the Flood literally occur in the 1656th year of Creation? The Flood in the 1996th? The Exodus in the 2448th?
Unless you wish to address these questions kindly don't respond to me again.