Dd is 12yo and had a pair last summer which she now can't get on her feet. So we went to buy some more today, tried getting the next size up and she couldn't get her feet in. Even the next size p was a struggle actually getting her foot in the shoe. She managed in the end and there was loads of space length wise but they were really tight where the elastic bit is at the top, painfully so. Are they meant to be like that?