Hi, the add to cart button is not showing when products are variable, yes in single products. http://www.papallou.com/shop2017/
Variable product: http://www.papallou.com/shop2017/product/1865-pelisse/
Single product:http://www.papallou.com/shop2017/product/tiara-headband/

Also when only have 1 image it shows a big black square in the thumbnails