something is not working with the variant display options. Inline radio sizes is not following the stock level. See this example:
https://www.vsathletics.com/store/VS-Athletics-Weightlifting-Shoe-II.html
If I choose stacked radio buttons, they all show and can all be selected, even though no error message appears when an out-of-stock item is added to cart???
But if I choose Inline Radio Sizes, it completely ignores whats in stock. Size 11.5 has 13 in stock and the skin is greying it out. (see pic)
Also, you can choose it and add it to the cart, so its functional but misleading as its greyed out. Verified that its also doing this on my test site if you need a playground to work on i.t