I had about 20 eggs in the incubator. Midway through development all the eggs stopped growing. The very last egg in the incubator was the only one to hatch. I don't understand as there were other eggs put in the same day or day before and they were all fertile. I'm just confused about what happened. Some of them leaked horrible smelling droplets and I took them out immediately, while others didn't leak at all. But why did only the 1 out of 20 hatch? Shouldn't it have gone bad too?