There is no such breed as 'Black Star' or 'Golden Comet'; but they still use those names. For some reason, hatcheries have no problem making up names for their sexlinks, but coming up with their own name for their 'Ameraucana' is something they refuse to do.
Yeah, it just doesn't make sense. It almost seems like they are intentionally misrepresenting the birds to make a sale (kinda like a used car salesman) but WHY don't they mind that it gives them a bad reputation??
They use that name because it sells. It is the name most people associate with the blue egg layer. If the hatcheries would at least add some tag to their name or use their version of spelling consistantly , "Americana", that would help. But I think what really needs to be done is 4-H shows and county fair judges need to stop accepting these EE's as Ameraucana in the shows.
Really?

Jerry,
I've seen stubs start to show up a few to several times over the years after crossbreeding and outcrossing, even though neither of the parent birds had feather legs or stubs.
As I checked my notes I see the problem some are having is "double spurs" from the Sumatra crossbreeding, not stubs, but stubs could be popping up also after a cross like that.
Brahma, Wyandotte and Orpington were used to bring buff color into Ameraucana buff bantams.
Orpington for LF, but as you say Polish was added later. Buff bantams were crossed into LF also and whatever it took, was done.
I did find out a year or so back that "if it looks like the breed it is the breed" and people bring in other breeds to "improve" a feature (this was on the Cubalaya thread) but geez, I would think it awful dangerous to cross in something like a fru-fru topped Polish. How long before people end up with "sports" with feather duster hats??