Well, I don’t know who’s official but I’ve played hundreds of games of A&A over many years.
Normally veteran players on the site would count the first 6 as the bombardment and count it a miss.
However, your friend is not a veteran player on the site. He is pretty confused because he rolled 4 ships when only one can bombard.
I would strongly suggest that you re-roll the bombardment, with one die. Keep the infantry miss.