Eggs like that coming out of such young hens is very concerning. It could be diet. I would put them on layer feed plus oyster shell and cut way down or eliminate all treats. Some greens such as spinach will prevent adequate absorption of calcium. Feeding excessive treats can displace the amount of balanced feed they eat and cause a nutrient deficiency.
Please understand that I haven't the time to read each and every post on your thread so I may not have all the information. My take is not meant as criticism.