Exporting - Standard cost being rounded

Hello

Since when is MYOB rounding the standard cost value to two decimal places when exporting?

As standard costs are entered as including GST we usaully enter them to 3 decimal places so they "should" come up on our ex GST purchase orders etc as the correct two decimal places. 

Just exported our items and they are being rounded to two decimal places.  Why is this?

Thanks John