When I make a fleet, I like to set its engagement range and fleet cohesion and so on (like tight formation for advent fleets with guardians and illuminators), but when I park the fleet somewhere and build ships, they join the fleet automatically, and now instead of engage enemies in gravity well, the engagement rules says "mixed" because of the new ships

how do I make fleet behavior stick when new ships are added to the fleet? is there a way to change the default behavior?

Thanks,  your neighbourhood noob.