I am having trouble seeing that chick's comb clearly--it looked a bit like a pea comb, based on what I saw, and those those are the only pea comb breeds in the list.
Clearly, I must have gotten the comb wrong.
You are right on the comb but there is one more breed that has that kind of comb!
A bird cannot have a pea comb unless at least one parent also had a pea comb.
The comb types of every bird on your list:
Single Comb:
Ayam Cemani (either gender)
High Line Brown
Buff Orpington
Speckled Sussex
Barred Rock
Australorp
Brown Leghorn
Welsummer
Rode Island Red/Buff Orpington
Maran
Cinnamon Queen
Rose Comb:
Gold Lace Wyandotte
Dominique
Silver Lace Wyandotte
Pea Comb:
Ameraucana
Araucana
Rode Island Red/Ameraucana
So if chick #3 does have a pea comb, either it has one parent that is Ameraucana, Araucana, or the Ameraucana-cross rooster; or one of your chickens has a comb type that is wrong for its breed.