My araucana laid a brown egg?

I got two identical birds a week ago. I was told they were araucanas. I know the frequent label issues where you get EEs that are called araucanas. With the great price as well as the physical traits of the birds (rumpless with long tufts) I figured I could be hopeful, but wouldn't hold my breath until getting that first egg.

Yesterday the first egg arrived from one of the birds. It was torpedo shaped, felt like sand paper and had a weird powder coating on it. I get that weird eggs happen, especially during a stressful move. The part that I was up in arms about was that it was pale brown. I knew there was a chance the guy was lying, but I was still disappointed.

Today the other laid. It had a super thin shell (in fact I put my finger through it collecting it) but it's a beautiful sky blue inside and out. If I had gotten this one first, I'd say I got araucanas. With the funky brown one, I'm just confused. Why would he sell me one purebred and one mutt? Could the first bird just be having an off day? Is it possible for purebreds to lay brown?

 

I know it's from the right bird because I watched her lay it. I'll try to post a pic when I get to my laptop.

 

I am not positive that she is pure, but it would be odd to sell a purebred and a mutt that are identical (in my opinion). She is not the one in my profile. Still waiting to get a picture. The inside of the shell was creamy colored. Definitely not blue.

 

Pea comb. She still hasn't laid another egg since. It's been two weeks.