This might be a stupid question, but.....if a chicken can tell a bad egg and boot it out, can't your male emu? Maybe he isn't sitting because there aren't that many good eggs yet?Will you take the good ones back? If he hasn't yet he probably won't. You will have given him a chance. And you could leave him the bad two so if he decides to sit on them you could give him the good ones back.
Does the female emu sit on them at all? You've only mentioned the male doing the sitting.
LOVE LOVE LOVE this thread!!!!