William Keith, 1st Earl Marischal - Janet assigned to wrong mother and her real mother not even mentioned as a wife on the actual profile, WHY?

Why is there no mention about Marjorie Fraser in the wives of this profile for William Keith and why is Janet put as the daughter of William and Margaret Erskine, instead or Marjorie Fraser as said in the sources - the same sources that have been written underneath this profile?
Here a text that clearly states that Janet was supposed to be the daughter of marjorie Fraser .who as of now doesn't even exist as a wife of William Keith 1 earl marischal. Can someone explain why this has been totally disregarded:

" William de Keith, 1st Earl Marischal was the son of Sir William Keith and Mary Hamilton.2 He married Margaret Erskine, daughter of Thomas Erskine, 2nd Lord Erskine and Janet Douglas.3 He died from 10 December 1482 to 1483.4
He held the office of Great Marishal of Scotland.5 He was created 1st Lord Keith [Scotland] before July 1451.6 He was created 1st Earl Marischal [Scotland] between 5 November 1457 and 4 July 1458.4
Child of William de Keith, 1st Earl Marischal and Marjorie Fraser

Lady Janet Keith+6 d. b 1504

Child of William de Keith, 1st Earl Marischal

Egidia Keith+

Children of William de Keith, 1st Earl Marischal and Margaret Erskine

William Keith, 2nd Earl Marischal+5 d. fr 24 Nov 1526 - 2 May 1527
Lady Mary Keith+7. "....