Agree with aart. new layers do weird things from time to time. Shell abnormalities are nothing to worry about, and not necessarily a sign of calcium deficiency. A female of pretty much any species can have reproductive abnormalities when things start cycling, and since hens cycle every day there's more opportunity for glitches. Wrinkled, lumps, bumps, ridges, specks, sometime they forget the shell altogether....it's all okay as long as it's not a regular thing.