Missing 6 Banners in GAC calculation

I just had to clear the fleet sector and the score was 1486 / 1776
71 was enough to win ( 1486 + 219 + 71 = 1776 and I have more GP)

The fight ended with exactly 71 and I was happy until I saw the result :-(

It is 1770 - 1776 - so I loose even though I won.