Who laid those little fart eggs? I have 2 light brahmas about 5-6 mos old and an EE the same age, had to be 2 of them; going to have to do some surveillance.
What a nice selection of eggs! I'm no expert, but my guess would be that that little brown egg is likely from one of the brahmas, and the lighter one could possibly be from your EE. Hopefully someone more experienced than me comes along soon to help out.