I would put the new ones in the box and leave the older eggs to hatch in the incubator if they will. If they don't get the incubator ready with the temps and humidity on the link I sent you from Metzers hatchery and move the new eggs into that.So what ones would I put in the box one that’ll hatch any time now or the 2 new ones? The box is already set up has been for a few days.
How long have those new eggs been in that incubator in that high humidity?