After looking more into Anconas, I think that is what she is. She fits the description (size, laying ability, color, comb size). I don't believe she is going to be great layer. I've seen reports of 160-180 eggs for Anconas.
On Cackle's website, they list Araucanas and use Ameraucanas and Easter Eggers on the birds interchangeably. Clearly the birds are Easter Eggers since they are tailed and they breed for many colors.
So with all that in mind, I believe she is Ancona but promoted as Exchequer Leghorn.
She's a sweet bird. I'm happy and she doesn't have to be great at laying. When she was younger and in my layer pen, she used to coming running to me and start hopping up in the air repeatedly. She would follow me to the door and be right there when I opened the door. So she has a lot of personality.