Gunnora d'Aunou - Several consistency issues

Consistency Check:
Hawise (Heloise) de Guînes contains an alias in her first name.
More than 22 year age difference between Gunnora d'Aunou and her husband Gilbert Crispin, baron of Tillieres & Bec.
Gunnora d'Aunou is under 12 years old for the birth of her child Gilbert II, Castellan of Tillières.
Gunnora d'Aunou is under 12 years old for the birth of her child Elise (Hesilia) Crispin de Brionne.

I know some could be correct. But had a child at 1 and 2 I have a hard time believing .