[CenturyPerf]

I'm seeing orders that are not properly communicating between:
Client Site <<>> X-Payments <<>> Authorize.net AIM.

However, these are domestic (not international) orders.

The orders are being authorized for capture, but are NOT creating an invoice in the store. Meaning, my client cannot see that an order was placed. I can only see these orders in Authorize,net and X-Payments. And it seems these invisible orders are occurring more often (seven since November 21st).

Regarding these invisible orders:
1) They do NOT show an invoice inside XCart 5.2.10
2) The do show in my client's Authorize.net account as UNSETTLED
3) I can CAPTURE the order and collect the invoice from Authorize.net's merchant portal
4) I see the payment as "authorized" inside X-Payments
5) I can CAPTURE the order inside X-Payments

What else do you need to try and solve this interesting and annoying problem? My client has started screaming at me over it, and now I have to manually check for orders in X-Payments every day to make sure no orders have been missed.