blockchain.info api (Balance Updates [POST]) confirmations not received
You need to set onNotification to KEEP, otherwise all future notifications such as those for confirmation number will not be sent.

From the docs:


  You are required to specify the request's notification behaviour. Setting the behaviour to 'DELETE' will delete the request after the first relelvant notification is sent to your callback address. Setting the behaviour to 'KEEP' will send additional notifications every time a transaction with the specified confirmations and operation type is sent to or from the address in the request.