re graveyard last puzzle; i can't stop them getting elderly at 50 - 52 then dieing at 58ish, after level 2 nor can i get level 3 medicine points before that. so any help appreciated

with level 2 medicine they shouldn't get elderly before 58; even if they became elderly before you got level 2 medicine, they'll go back healthy until age 58.. which means they should stay alive until 65-67 at least. Have you at least got level 2 science tech? that would rack up your tech points faster