Considering that you need to have your flagship alive at all times, I don't see the point. Its a lot easier just to make the flagship not cost any fleet supply than to have a conditional check for the victory condition to add extra fleet supply. It would also make the Vasari tech that increases fleet supply by a percentage slightly more effective, so it would actually have a minor affect one gameplay.

Yes I see your point, I agree with you, it should be zero supply. I guess it's a limitation of the game engine, maybe a ship with no supply can't exist! So they had to give it 1 point. But still it's kinda an inconsistency.

And you are also right about the Vasari tech that increases fleet supply. It would affect gameplay depending if the Flagship Victory is enabled or not! Darn!

I know it's a minor glitch, but still annoying!