PC, what type of incubator are you using? What type of thermometer? My hatch rate on shipped eggs varies from 80% to 10%. Shipped eggs are always a gamble and it is easy to get spoiled with a few good hatches with them. The only things that is curious is that typically, transit damage will cause eggs to either not develop or die so early that it appears development never began. I had a lot of problems a while back with early death in development. It turned out that my incubator temp was too high, 102. It did not kill all of the chicks but I finally knew something was wrong when I was getting chicks hatching out on day 18. Some of those chicks also had minor foot deformities as well.
Richard