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You do have a thermometer/hygrometer for your temp and humidity level readings? Your temp sounds right but that can still be off if your instruments are not reading properly. I'd put two in the bator to see how well they come to a common reading. Other than that I have no idea what the problem could be. I do think you rushed in to soon, I've had chicks hatch out as late as day 25 when my temps were too low. I don't see movement in the eggs even on day 18.
Patience!