rob, you clearly have a lack of water on vault 999... that leads to radiation...
and there's one thing you and massacre are both missing... STOP DOING IT LIKE THEY DO ON THE DISCOVERY CHANNEL!!! lol having a bunch of babies completely throws off the balance of the vault... do it periodically, do it when you feel stabilized... i tend to have babies when i get a good objective that asks for babies...
the lunchboxes are completely random... on my first official vault, i unlocked butch and abraham washington... then a few random decent wanderers for later... my 2nd vault? not a god damn special character at all, just a couple randomly generated ones... however, there is one weapon i tend to always unlock early... the experimental MIRV... i dunno why, but it's usually one of the earliest weapons i get from the lunchboxes...
still haven't played this game since the update, lol ...