check this thread:NT.... have you tracked the hatch rate as it relates to how long the eggs sit before you start incubation? In other words, do eggs hatch at a lower rate if they wait longer before incubation.... 14 days is a long wait to hatch. Do you keep them chilled for the 14 days? I do a rolling incubation and I have never had as high a success rate as you have. But I have big issues with too much humidity. I finally put in a digital temp controller and went a dry hatch.... but again still not at the rate of success you achieved. Congrats.
https://www.backyardchickens.com/t/1064109/you-cant-store-hatching-eggs-like-that