MONCHY, MOUCHY & TOUCY

Can anyone help sort out (or confuse the issue more) on the following:

Some info taken from the internet with no sources (sorry), or I don't have copies of sources if listed.

1. Irmengarde (Ermengarde) de MONCHY, b. c. 1124/5, 1m. to Guillaume I de DAMPIERRE (Guy I de DAMPIERRE & Helvide de BAUDEMONT), b. c. 1124/5, d. bet. 1161-72. [ref. for m. ES (Schwennicke) v.3, table 51., http://www.genealogics.org/getperson.php?personID=I00028304&tre... ].  She 2m. 1161 [same ref. ES] to Dreux I/IV de MELLO (Dreux IV de MELLO & [Basilie] de BEAUVAIS), b. c. 1125/38, d. 3 Mar 1218, http://racineshistoire.free.fr/LGN/PDF/Mouchy.pdf, p.2 right hand side) (he is also listed as s/o Dreux de MELLO & Agnes de TOUCY (Leo) and his wives also listed as unknown, or he 1m. Basilie de MOUCHY & 2m. Ermengarde [poss DAMPIERRE].

In turn, Irmengarde is also listed as parentage unknown or uncertain. Father also listed as Dreux I or II.    She is also listed as de DAMPIERRE and de ROUCY.  Her mother Adelaide, also listed as unknown lineage.  Parents also listed as Dreux III & Edith de WARENNE or Ithier de TOUCY & Elisabeth de JOIGNY. [ref. http://genealogiequebec.info/testphp/info.php?no=100973] However, Irmengarde de TOUCY is given a different husband - http://gw.geneanet.org/wailly?lang=en&p=ithier+iii&n=de+toucy  & http://roglo.eu/roglo?lang=en&m=NG&n=irmengarde+de+monchy&a... lists the DAMPIERRE marriage also, but not the MELLO marriage.  So what is the truth.

2. Adelaide or Ade? de PICQUIGNY. Poss. d/o Guermond II de PICQUIGNY & Beatrix de SAINT-VALERIE (she is also listed as de DOURS, a different lineage). See Brandenburg, Die Nachkommen Karls des Grossen, XIII 498b, Deladreue, "Berneuil, Notice Historique et Archéologique", p 463-464 &  http://racineshistoire.free.fr/LGN/PDF/Mouchy.pdf, p.2, left hand side, and http://racineshistoire.free.fr/LGN/PDF/Picquigny.pdf, page 2.  Are they the same couple as http://racineshistoire.free.fr/LGN/PDF/Monchy.pdf top of page 2?

Thank you for any clarification. Jim.