The Chatot (also Chacato or Chactoo) were a Native American tribe who lived in the upper Apalachicola River and Chipola River basins in what is now Florida. They spoke a Muskogean language, which may have been the same as that of the Pensacola people.
The Chatot people and Pensacola people spoke the same Muskogean language.
The context states that the language spoken by the Chatot may have been the same language spoken by the Pensacola people. It does not say that it was definitely the same language. I believe that the system had trouble with this because there was no clear distinction between potential languages.