Lori, I'd first really check your instruments to eliminate that possibility that they are a bit off. They did develop, at least, so you were certainly doing something right. I'll start collecting for you when my other customer picks up her eggs tomorrow and we'll go from there. In some hatches, I'll have all hatch nice and clean, not even a mess in the bator, then one will end up dying at about 18 days and become shrinkwrapped in the membrane. The fact that the others hatch as well as they do and with no mess or rough navels tells me the temp and humidity values are correct, but perhaps there was something wrong with that one chick. Could have just be slightly malpositioned or something else. Sometimes you just never know. It's disappointing that none made it out, I know. Try again with these new eggs and I bet it does better for you this time around. If not, I'll hatch you some here and you can just pick them up.