. The test link should work now. Give it another try. It should ping you back in 10 seconds or less.

. We just pushed retry feature out. the system will retry up to 9 times over 3 days period if not http 200. However, number of confirmation will always be number of confirmation in initial payment notification.

. A workaround to the use case you are talking about will be to create an order with large amount. The system will send you payment notification every time a buyer pays to that address.