User Activity

If a buyer requests a cancellation after they have bid on an item and the auction has ended do I get my fees reimbursed or do I need to go through the resolution centre and mark the item as not paid to receive my fees back?
When I try to add a buy it now listing it only comes up with a maximum of a 10 day listing. I often see buy it now items for a lot longer than this and want to know how to do this if anyone can help. Thanks.