Thanks for reaching out! I'm sorry about the confusion with pricing. The Main Store page shows the lowest priced variant of that product, and some of the sizes are on pre-order for a lower price. Shoe shipping now are full price. You can see the price change when you click a size that is in-stock versus out-of-stock.
This is a default feature of Shopify (our ecommerce engine), but we are working with a webdev now to change it!