I dont exactly know what trigger this problem in the trainer, but when you use one of the options,
the villager's age is static and they wont age, only breed and i'm ending up with a huge population of 1yo children and zillion nurseries,
what is the option in the trainer that triggers it?
and can it be fixed somehow?
CH didn't make the trainer, so they cannot be held responsible for it's creation/alteration. I would simply suggest turning off that option and waiting till they die, or making platoons and getting them slaughtered? Could always start teaching your Creature to eat 'em. Or load from a save before you initiated that option?
Just an idea.