Paypal Express - Never Charged for Shipping

-- HikaShop version -- : 2.3.2
-- Joomla version -- : 3.3.3
-- PHP version -- : 5.3

I searched around, but didn't see an answer to my problem.

I can successfully use the Paypal Express payment method, but its not charging for shipping. Here's what happens:

1. Add product to cart
2. Click checkout with paypal
3. redirected to paypal where I choose shipping address and payment terms
4. redirected back to my website and get an order complete confirmation.

That's it. I'm charged for the product and the order is marked as confirmed.

I'm under the impression that once I'm redirected back to my website from Paypal I should continue through the checkout process to calculate and select shipping charges. Then Paypal will charge me for the total cost including shipping once I have completed the checkout process on my site.

Am I missing some configuration setting for this to work properly? If not, what would be the solution?

Thanks!

Thanks for the explanation. Makes perfect sense.