Joan BEAUFORT, Queen of Scots - Too Many Children

Wikipedia https://en.wikipedia.org/wiki/Joan_Beaufort,_Queen_of_Scots lists Joan as having the following 11 children:

Margaret, Dauphine of France
Isabella, Duchess of Brittany
Eleanor, Archduchess of Austria
Mary, Countess of Buchan
Joan, Countess of Morton
Alexander, Duke of Rothesay
James II, King of Scotland
Annabella, Countess of Huntly
John, 1st Earl of Atholl
James, 1st Earl of Buchan
Andrew, Bishop of Moray

I dont know if Wikipedia is correct or not but somehow this poor woman is listed as having 23 children, which is surely impossible and at best highly unlikely?