Sounds like the eggs you have now are on track. At 80F, they should hatch on the night of day 7. That day, you'll see VERY reflective eyes staring at you, and the fry will be restless in their egg casings. You may be right about the first two runs -- it takes them awhile to figure out how to get it right. After about a year, my female started taking care of the eggs, too. Gives the male a chance to eat
Take our advice on feeding, though (mine and Waffle's) and you'll get better quality eggs every time. If you have any plans on raising the babies, you need to start with good eggs. I breed clowns, and sometimes I just let them go if the eggs don't look right.