it seems like the child counter is completely non-functional, but i don't know if its a bug or if it just hasn't been implement yet
Hey there!
The offspring system is currently being overhauled, the newest version of the game (available for the time only to supporters) saves the offspring data in a different way and there, the counter works correctly. Apologies for the issues you encountered but, at least that issue, will soon be nonexistent ^^
Thanks for playing the game and take care!