I wish I had an easy answer for you....as I told you before...I have no experience with dilepis eggs.
You said..."what can I do to get rid of the mold? I have put foot powder on the egg, but it seems to be getting worse"...its possible that the egg just has something wrong with it and can't be saved.
You also said..."When I checked the eggs today I noticed that some are getting yellow spots......or turning yellow.....what does it mean? Anything I can do to get rid of it?"...these are signs of egg death, IMHO. I don't think there is anything you can do about it. It could be caused from improper incubation (too moist, too dry, too hot or cold)...or it might just be a health issue with the female. I would expect this (health issues) more from a WC than a CB.
I'm sorry I can't give you a better or more hopeful answer. Maybe someone else can?