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How do you calculate your percent hatch rate? Do you include the eggs that were infertile or only the quitters? I had 16 eggs from my flock that had 6 clear and two early quitters. Eight eggs went into lockdown and so far I have 7 chicks. Today is day 22 and I have 1 egg left. I really love this incubator, but this is my first time hatching my own eggs so I don't have any comparison.
When calculating the hatch rate for your incubator you subtract the clears/non-viable eggs that don't start to develop. If you're trying to calculate your rooster's fertility rate or viability of eggs then you would include the clears.
For example, it sounds like this is what yours would look like:
80% (started with 16, 6 infertile, 2 quitters, 8 live chicks)
62% Fertility/viability (6 of 16 eggs no development)