I gave been to three different clerks shops to get DD feet measured. I gave been getting her clarks shoes since she started cruising. But this time all three gave told me a different size to each other. How trained are these people? Does my DD need harder structured shoes to help her feet grow properly or will sandles and softer trainers be ok? I have lost my faith in clarks now and worried I could effect her foot development by not getting sturdier shoes