... I didnt even catch the 0.2 group, and misread the "hasn't been with a male since being a wee little hatchling" part.
As far as laying multiple, infertile clutchs without mating, a little more information is needed there. Do you own any male cresteds, that are in the same room and within viewing sight of the female. Sometimes, when a female is ready to reproduce, the sight of a male will cause them to start producing eggs, fertilized or not. Keep in mind, that in "the wild" when these two see each other, breeding is more than likely going to occur.
If this is the case, (you having a male in viewing sight) I would suggest moving them to opposite sides of the room, and obstructing the females view of him. Im not sure how pheromones play into crested breeding, so I really can't say if his presence would still induce the same behavior, even without seeing him.
If this isn't the case, and you dont have a male in the room, then I really have no idea what could be causing this. Best of luck, and drop us a bit more information if you could.