Welcome to the wonderful world of owning chickens :)
You've run into something that is a very common issue to people who buy 'Ameraucanas' or 'Araucanas' from hatcheries and feedstores. They are mislabling their birds. What they offer is a mixed breed that is referred to as "easter eggers' because of their tendency to lay colored eggs. Ameraucanas are a VERY strictly regulated breed that can only come in a few colors, as you've run into.
However, since Easter Eggers arn't a breed, there's no regulation, and they can have all sorts of mixed features (even laying brown eggs instead of blue or green). It doesn't mean there is anything wrong with your birds, in fact I own an EE and she is hilarious and friendly.
Your birds will grow up to either be silver or gold duckwing pattern. Here is a picture of my silver duckwing EE. Her name is Iti; please don't mind her wet beard, she was getting it wet that day :P.