WooCommerce Variations not showing correctly

Hello!

The product variations at the front-end, specifically in the Single Product Page, are not updating SKU’s, images, colors, sizes, nothing, stock quantity…

The dropdowns show every attribute and every color, not necessarily what’s in stock. For example, I have two colors but one different size for each (Gray XS and Blue S), in that case, the dropdowns show both colors and both sizes, even when you choose Gray, both XS and S show, and it shouldn’t.

The SKU’s and images, correctly set up and different, don’t update at the front-end (Single Product Page) when you choose something from the variation. Also, the stock quantity doesn’t update, at the WooCommerce settings page I activated ALWAYS SHOW, and they don’t.

I don’t know what’s causing this.
I removed every plugin and used the Twenty Sixteen Theme, but the issue still persists.

Please help, :(!