Oz Somewhere I read about pre incubating eggs to be shipped. on the order of like three days then chill them down and ship them. Its a vague memory because It wasn't on my plate at the time but I thought Hmmm.... It might be worth an experiment with your twice shipped eggs because think about it they get shipped to you even at last minute they then get repackaged and re shipped.
I will dig up the article..... if you think you might want to give it a read.
Past poultry: Buff Brhama, EE, Barred rock, Wellsummer,
Bantam mixes, Araucana, Turkeys, & Guinea Fowl.
Future poultry: Guinea Fowl, Sumatra, Wellsummer, Muscovy
"A dream without a plan is just a wish" Katherine Paterson