Thank you for adding the Transaction ID field -- much appreciated! Would it be possible however to make this field editable in the backend, so that the data can be added by admins processing payments manually on Authorize.net?
Also, a Payment Date field in addition to the Transaction ID field would be most useful. For Pay Later registrations the registration date is not as relevant as the date the payment was processed, which is the actual date when the registration becomes active. I understand you are also working on adding a pending status for registrations, and the payment date would play very well with that because it can be read as the date the registration went from pending to active.