product permalink and URL not the same (woocommerce)

i found out the product permalink and the URL (when i previewed the product is different
for example: the permalink is domain.com/category/subcategory/product name
but when i clicked preview, the URL is like this (http://domain.com/?post_type=product&p=1233&preview=true)
now how do i make the URL is perfectly the same as the permalink?

the strange thing is, before the update of wordpress and woocommere, the products i created have matches permalink and URL.

now they don’t match, even though i created them (products BEFORE update and AFTER update) with the same process

can anybody help me on this one?

http://wordpress.org/support/topic/product-permalink-and-url-not-the-same-woocommerce?replies=2#post-4266006