Free Shipping usually applies only to the seller's own country.
Are you and the seller in the same country?
While most people understand 'combined' shipping to mean 'discounted', it really doesn't. It means that the purchases will be shipped together.
But I'd be annoyed if anyone pulled that on me too.
More to the point, did the seller state that he would combine shipping?
Buyer says that maybe it applies when checking out thru shopping cart.
Do you mean 'seller'? Proofreading is your friend.
Is the GSP involved?
The cart is necessary in GSP shipped purchases for combined (and discounted) shipping.
It is important to read not just the title of the listing, but the entire description.
This may mean scrolling to another page.
And if the seller is not in your country, it is also important to read the information on the Shipping tab.
