Cornelia Petronella van Emmenes du Plessis, b2 - Inconsistencies

Regarding her c 1706 birthdate:
Cornelia Petronella van Emmenes du Plessis, b2 is under 12 years old for the birth of her child Christina Catharina du Plessis Beukes.Cornelia Petronella van Emmenes du Plessis, b2 is under 12 years old for the birth of her child Pieter du Plessis, b1c1.Cornelia Petronella van Emmenes du Plessis, b2 is under 12 years old for the birth of her child Magdalena du Plessis, b1c4.