Paypal shipping address when paying for an item on a website help?

[astralman]

This seller gave me his website to pay, but when I paid the address does not show up on his side or my side even though my address is confirmed. I checked and when I click submit payment there is no address showing before checking out. He wants the address to show up so he is protected. Keep in mind this is his website he made and added paypal checkout button. So is this my fault or his fault? How does he fix this? Some internal setting in his paypal account?

[zoneout]

If the address doesnt show up how will he know where to ship it or maybe you clicked some option to pick it up at his store by mistake.