User Activity

Listed 1 item today ok, but created 3 more and when I go to submit the listing it doesn't complete, and the screen goes black with no way of escaping.Any ideas folks??
Reversing order cancellation. As a seller I cancelled an order because the buyer hadnt given me enough information.I now have the information and want to stop the cancelleation and post the item. How do I do it?
My accont shows £18.00 as not recieved, but as far as I know all buyers have paid ok and I cant see any transaction that gives rise to this.Any ideas please