Thanks for the update! You should leave the first one in there just to see what happens. Would it absorb the other embryo or something? Sorry, just curious lol. I hope the fairy egg develops, that would be neat. @CluckNDoodle have you ever incubated a double yolker?
I do always enjoy a good experiment!

Fairy eggs don't usually have a blastodisc to be fertilized because it actually passes through the oviduct before the yolk is released somehow, I can't remember the specifics but it's highly unlikely that it will do anything.
Double yolkers are something I avoid just because they can be heart breaking but not impossible to hatch.
Just to prepare you, the worst case scenario I've seen with a double yolker was two viable chicks developed but one of the chicks actually absorbed the other fully developed chick along with the yolk sac and it appeared to be pregnant with a kicking and peeping chick in it's abdomen when it hatched.
Best case you have two healthy chicks successfully hatch!
The most common outcome you see is that they quit before making it to hatch. If one embryo fails it makes an unhealthy environment for the other embryo eventually resulting in the other also quitting.
As long as you're prepared for that, I do wish you the very best! I look forward to your updates and I hope it works out!!