Sorry about the head count, I'm glad the one you helped is doing so well!
I've lost one of my Sebastopol eggs. It started to smell, I don't think it was even fertile... might have lost another... not moving when I candled last. I still left it in the incubator. The Black Australorps and Golden Laced Orpingtons go into lockdown tomorrow so chicks should be here this weekend! Sebastopols should hatch around April 13.
Sorry you lost a goose egg. I hope the rest of your hatch goes ok.