One would expect that the freight space reaches its maximum possible value when the player or one crew member has rank 4 in the logistics perk. Nonetheless, recruiting a crew member with logistics rank 1 (e.g. Sam Coe) earned me another 10% increase of my already maximized freight space (equal to 15% of the base space). This doesn't make sense. Even if the perks stacking is intended, the freight space increase should be calculated from the base freight space, and not from the value that already includes increases by other crew members' perks.