"It occurs to me that the person on Geneanet may have taken this to be 12 August instead of October, and they had noted that Anne Divivier and her husband Francois Dupin are mentioned in it.
It would be a bit odd, as the person on geneanet sounds like a French person, who would surely know about the dating system."
You are right : 12 8bre means 12 october and is an abbreviation that a genealogist should not take for august ( month number 8 is august in the calendar), but it could happen if the genalogist is an amateur or reads or writes too quickly.
