As you have already read, I think some here make a very basic mistake. And that is name calling, no not to eachother, but labelling tools. Like a nest box.
You provide something you call a next box, but your animal just calls it a box and wants something else.
The key to understanding this is, normally they are designed to lay in a area that dry and humid, and consistant in temperature and humidity, and there is absolutely no lite.
In most cases, this area is in the ground or other mass, like tree hollows, deep rock cracks that are IN. In nature, these areas are fairly large, that is, the conditions that allow the right choices are bigger then most if not all our cages.
What I am getting at is, no matter what you do, your FORCING the female to lay her eggs in a place she would not have picked on her own. Your forcing her to pick the most suitable is amoungst a limited amount of conditions.
Normally doing this forces the female to hold the eggs longer then necessary, and sometimes to a point of failure.
When provided with deep nesting that is closer to what they naturally have, they can and do lay one day after shedding. With little to no water loss and you can hardly tell they laid. Which is good for the female.
So what you are doing is working (the best you can) in conditions that really are not meant for good nesting. Some of you do a really good job at this. But its still not what or close to what they would actually do.
For instance, pyros nest in groups, so the females gather and stay very near the spot the eggs will be deposited. This is part of nesting. Generally that gathering spot is within a meter of where the eggs are laid. (note, not all populations do this, some nest alone)
So what your doing is fairly foreign to the animals, you must understand that.
The key is, temps and humidity. The hard part to understand is, dry and humid. So your moist(degrees of wet) Is not what they are looking for, and normally is one step short of the water bowl, when no satisfactory site can be found. Good luck and best wishes