There's a strange relation when combined with
Officer Extension:
1.- Officer Extension allows you to hire officers even if you are past your capacity, the issue is that the sleeper officers from the special instance added by this mod can't be hired if you are at your cap.
2.- Said officers start at level 7, however if you demote one of their skills via the functionality of the other mod, their new maximum level becomes 6, I'm guessing this happens because the "pod officers" added by that mod have five elite skills, which allows them to be retrained to level 7, while sleeper officers from Better Colonies are basically normal officers that are level 7. I understand overlooking this one as it would break the balance hard if you could get a full squad of lvl 7 custom officers with 5 elite skills, but I think it is worth noting regardless.