On the 821D form (And the I765 as well)

Did you all place your mothers last name as your full name on the Name sections? The lawyer that helped my sister and I advised us to place the full name on our birth certificate and matricula. I then explained in Part 7 of the 821D form that my fathers and mothers last names are both found on ny birth certificate and stated which one is my commonly used one (my fathers). Did anyone else have this slight intricacy?