St. Augustine's teaching was incorporated into a papal encyclical. That is Church teaching, not just "one guy".
It may have taken some time for this teaching to be accepted throughout the Church, but you have never shown any Catholic believing in flat earth (based on Scripture or any other reason) after 700. What Saints spoke about this after St. Augustine? Where did he "disobey his own statement"?
The Church teaches that Scripture is silent on the shape of the earth. Saying that it is impossible to miss it is going against Church teaching. (It is also contrary to the history of the Church, since Catholics have been missing seeing flat earth in Scripture since the middle ages.)
St. Basil also taught that Scripture is silent on the shape of the earth and that it is unimportant:
When was the globe officially accepted by the Church? Do you have that docuмent? Who wrote it? There should be something tangible out there if you're going to insist the Church accepted the globe. Silent apostasy of Catholics against Scripture is no proof. I've yet to see a Father who teaches how the globe works with the Scripture's descriptions of earth. And it's pretty haughty to contend that the nature of God's creation is unimportant. Your argument lauds generations of pagans who pushed for the globe relentlessly, hundreds of years BC and AD. Their nonsense finally got the Church's attention and She condemned the Pythagorean/Copernican Doctrine calling it "altogether false". Now, if the Church had actually accepted or taught earth was a globe, She would have singled the globe part out and said, "altogether condemned, except for the globe earth". But She didn't. The model was condemned
altogether. That means,
entirely. Add up every last Catholic who ever lived that believed earth was a globe and they don't even begin to outweigh the Fathers who echo Scripture and the liturgy. Too many Fathers expounded not only on Genesis, but Psalms, Job, Isaiah, and other biblical texts. Interesting how the sketch of the flat earth is found in many older Catholic bibles. You'll certainly never find a sketch of the globe in an older bible. This isn't even legitimately up for debate as we have Father's quotes, their teachings and how those teachings work with, and bring to life Scriptural texts. We also have the science to back the Fathers up. The Fathers taught that church architecture, the liturgy, the vestments, the altar, the dome, the pillars, the Sacrifice, the candles, down to the scalloped edge on the altar cloth, together reflect, within themselves, a microcosm of the earth and seas. And, that the earth is a macrocosm of the Church. That's not some random notion of the Saints. That...is
revelation.