Globe earth had already been generally accepted by Catholics for hundreds of years before St. Thomas. St. Bede taught it around 700 and St. Thomas lived in the 1200s. You have shown no sound evidence that anybody believed in flat earth after 700.
Globe earth was around for even longer than the Church. It started with the occultist, Pythagoras.
Only St. Bede clearly believed the globe. It is reasonable to presume that people continued to accept the flat earth for a long time after the middle ages. Even if what you say is true.
This is the most reasonable position.
I think an objective observer will see you are trying to push this case and impose your view on the past. Despite the evidence.
Combined with the fact that you admit you do not look at the science, and people will see you are not objective about this.