Guillaume Guerlenc de Corbeil, Count de Corbeil et d'Avranches - mother and wife are the same person

His profile shows he is the Son of Mauger, Count of Corbeil and Germaine Bassenville de Corbeil, Countess of Corbel

It also shows he is the Husband of Germaine Bassenville de Corbeil, Countess of Corbel

According to MedLands,
http://fmg.ac/Projects/MedLands/parcorroc.htm
MAUGER de Normandie, son of RICHARD I "Sans-Peur" Comte [de Normandie] & his second wife Gunnora --- (-[1033/40]).
m GERMAINE de Corbeil, daughter of ALBERT Comte de Corbeil & his wife ---.
Comte Mauger & his wife had one child:

1. GUILLAUME "Guerlenc" de Corbeil (-1067).
The name of Guillaume's wife is not known. Guillaume & his wife had three children:

a) FERRY de Corbeil .

b) PAYEN de Corbeil .

c) RENAUD de Corbeil

It would seem his mother is correct, but his wife is wrong