Have you tried tightening up the shoe laces? It might help them to fit more snug on the feet.Bear in mind that the shoes are hollow, so you need feet to fill them, and being hollow they are a little oversized.
They must have a few already in stock, as i ordered from luck-market on Tuesday, and it was shipped this morning.luck-market take their time sending sculpts out:
It's like they're getting them painted to order, or they don't actually hold them in stock.