I have the same issue. When I change the configurable options in the drop down menu, it changes only price. But it doesn't change such as sku, description, additional info of associated simple products. It was worked well before. I think it happens after I upgraded magento into 1.9.2.2 . please help me about this issue. please check this link :
https://www.bestdeals4ever.com/green-skeleton-dinosaur-dog-costume.html
thanks