[oleg]

"No - the Num Must Have At Least 1 Ability := 1, and the Must Have Ability 1 := Launch/Recover Fighters instruct the AI that the ship has 1 ability it must have and that the ability is Launch/Recover Fighters. That will place a total of 1 Fighter bay on the ship. What instructs the AI on what type of hull to use is the Majority Component ability - Cargo will select a transport and add cargo bays until the 50% requirement is met, Launch/Recover Fighters will result in a carrier, and Colonize types will result in a colony ship. For example, if you wish to construct a carrier using a battle cruiser hull try:"

No, it will fill 50% of carrier hull with fighter bays. Trust me. Note the word "carrier". You are absolutely right if you want non-carrier hull, like BC in your example. AI will ideed put just 1 FB. But I was talking about carrier hulls - then AI works as I told.