Are these behaviors abnormal?

Question
My female who now has two eggs is incubating all the time, but recently I've been finding very large droppings in the cage. These droppings are not runny like diarrhea, they have the consistency of normal droppings. She also did one inside of the nest box. Does this mean she is egg binding? Also I have noticed her cere has changed from a crusty brown color to a white color. What can this mean?

Answer
Ceres do change color often, especially during breeding time.  When she is ready to mate, it becomes a crusty brown color.  Now that she is done mating, it is going to become a less bold color for a while as a signal to other birds that she is not interested.

The issue you're having with droppings is pretty normal.  She probably isn't eggbound.  Often when a female is eggbound she will not have much in the way of droppings because her vent is blocked (they use the same opening for breeding and pooping).

I wouldn't stress over these issues; everything sounds normal!