Well my first try at hatching shipped eggs was heartbreaking..... I ordered 24 shipped eggs and received 30. Of these 3 were broken from shipping. I put 27 shipped eggs in the bator, only 6 made it to lock down. Of these 6 only got 1 to hatch, the others died in their shells around day 19 or 20. I also set 4 of my barnyard mixes at the same time and all 4 of these hatched with no problem. I have 5 light Sussex shipped eggs in the bator now with some local mixed breed eggs. I'm keeping my fingers crossed for these eggs.
That's rough. So sad that they made it til the end then gave up. At least your own eggs hatched well. Good luck on the new eggs!