Yea. The "massive ships" flag thing is just confusing, and frankley, always has been ever sense exo waves were introduced. It only counts wave "leaders" (which might or might not actually be "massive"; it is allowed for starships or even fleetships to be an exo-subfleet's "leader", even though this almost never happens unless exo-budget was pretty low), and even then, it sometimes seems to be inconsistent with that. At least the strength display it has seems to be about right.