The East German staff (team directors and doctors) probably didn't really know which dosis of Doping Medication was the right one for the performance enhancing treatments.

The substances were newly discovered, and in the 1970s/80 nobody on Earth has ever used that human growth hormone on children or young adults. So, I guess the medical staff simply, systematically, tried a whole range of concentrations on their athletes. Those who then performed best in training were promoted to the Olympic team. Those who received too little were removed from the national team.

And those who received too high concentrations? They had their adolescent bodies messed up, but were simply neglected afterwards. A very cynical program indeed.