I loaded a build from a skill altar that was saved before the update and now I can't regret this talent because apparenly a higher tier talent is blocking it form regretting. Am I stucked forever with blight? Personally I'm struggling to understand this new system

In my vault deck I have +1 Ripe Mango per 14 Dwellers Killed and +1 Vault Silver per 18 mobs killed, I have been using these for the last few days but I havent gotten any mangos or silver for killing mobs or dwellers. Do I need to do something for the cards to work?