8.6 cents only if they show it

Again it bewilders me .I have just bought more OBJ shares with nab trade at 8.6 cents . I look at the confirmation of my trade and it says it cost me 8.6 cents and the exchange is ASX. This did not show up on the nab trade screen. I rang and asked nab trade the price that they went through on and on what exchange .They confirmed 8.6 but they then told me that they always write down the ASX but in actual fact the trade went through on the CHI-X . this is why it does not show up .