Intermittent entries without Authorize.net data

Recently launched a new ordering system and we're experiencing intermittent problems with the Authorize.net integration. We are seeing ~15% of our entries in Gravity Forms with no associated entry at Authorize.net.

These records are display the following characteristics inside of each Gravity Forms record:

• Payment Status: Approved
• Transaction Id: N/A
• Payment Amount: $0.00
• Total: NULL

These records have NO associated data at Authorize.net. I went through and tested multiple fake card numbers, incorrect addresses, etc and wasn't able to reproduce this issue.

Any idea what may be causing this? What can I do to debug it further?

Thanks.

Thanks David, that's up and running now. Hopefully it helps point out where the problem is.

Had a couple of successful orders and then another that is missing all Authorize.net info, here's what I see in the logs;

• Authorize.net Log
• 2013-07-11 14:22:02 - DEBUG --> Starting to make a product payment for form: 1
• 2013-07-11 14:22:02 - DEBUG --> Amount is 0. No need to process payment, but act as if transaction was successful

The form in question lives here; https://skydivesandiego.com/tandem-skydive/purchase-tandem-skydive/

There should be no way to push an entry through with $0.

Actually, if you disable JavaScript it's possible to push through with $0. Added validation to prevent that from happening. Hopefully that clears this up.