Paypal Express Shipping Calculation Step

using paypal express, adding products to cart say = £10.00
hit paypal express button, and window opens for paypal details but still only shows £10.00, no shipping is included on the calculation, user has to select pay now, then is directed back to the store to choose shipping.

Is this correct seems like a couple of extra steps too many


Looks like correct way of integration according to PayPal docs