Hulley Howley

Ok, so I went to buy something, so I clicked buy now to put it into my cart for later. So I could decide, now I decided I didn't want to buy the other things in my cart but secondlife is still trying to give me an invoice and saay I'm being charged for them although I don't want the items I just was comparing them? SO why was the system turned into such a PURE CRAP system?