“As a chenopod, quinoa is closely related to species such as beetroots, spinach and tumbleweeds.”
Still not a Berry. And still does not deflect the reason why some will say that the chashash of kitniyos applies. Obviously there are differences if kitniyos should be extended to include, but for that ask your own Rov, if you have one.
“Potato Bread in the store is Chometz as is Corn Bread. Its only because that how they make it”
SO then, how common is Potato Bread without flour? Your proof was from potato bread near the frank buns. But those all have flour.
But there are some who do not eat potatoes on pesach, what is your response to that?
Mustard being considered kitnyos is not “new”, The same with wild Rice.
What the Oruch Hashulchan says about those who are Mefakfek or Meikel on kitnyos is that they are testifying about themselves that “Ayn bohem yiras shomayim veyiras chet, v’ayn beki’in b’darchei Torah.” (O’C 453.4)