We incubated 18 eggs and by lockdown we were down to 5. Currently 3 have pipped and 2 have fully hatched. My question is - if we made some kind of mistake which caused the others to not make it - why would SOME make it? Wouldn't none of them make it if we did something wrong? Seems like temp/humidity/candeling must've been right if some were able to hatch, but why didn't all hatch?