PayPal Standard IPN Response Record Update and Email Problem

I ran a live test with PayPal Standard and the results are close. The IPN response updates the correct record in the orders table with the PaymentConfirmation number. However, I need help on the following, please:

1. OrderStatus – What is the type of response that is sent back from PP? The table is set to accept a numeric response. Are they sending back a string value and what can it be? I have been looking for days to find this out in their documentation. If it is a string then at what point in the code can I set it to a numeric value?

2. ShipTrackingID – Did not get a value from my Security Assist Random Password binding. I am not sure if I can add it directly to the record update code block through the update record server behaviour.

3. Email Order Confirmation To Customer – This was not sent. Does it need to go before the record update code? Or is there another problem that I am missing?

Platform: eCart 4.5.2, Universal Email, MySQL, php