Question about CECA payment and number of order

-- url of the page with the problem -- : www.tiendamat.com
-- HikaShop version -- : 2.6.3
-- Joomla version -- : 3.5.1

I just got my first order and was paid by credit card. The costumer had no problems at all, and paid perfectly.

Here is the problem I found, though:

- Hikashop creates an order with number B3J1
- Ceca doesn't reflect that number anywhere, neither the costumer number or name. The only thing that gives me is a number of operation (31) and a reference (28 numbers)

So the only thing that allows me to know which order was paid, is the total ammount. That should be enough, in case I get around 1 order a day, but the day I get 2 orders with the same ammount, how can I know which one is it?

Thank you very much.

Thank you very much Nicolas