Ok I set these eggs on the 20th so are my dates as follows? Day1-21st Day 7 - 27th Day 14-6th Day18-10th Day21-13th is that correct? Second question is are these air cells correct for day 9? I've weighed the eggs and they've lost some weight dropping from 2.4 oz. to 2.2 oz. Some have lost slightly less than this but this is the average.