TOPIC: Nested conditional fee fields

If my user is bringing a child, she clicks on a radio button "Accompanying child". If she clicks "Yes", conditional fields appear: The child's name, and the child's age, which is a fee field - depending on age, a fee is added to the total. This all works fine.
One more conditional field appears - "2nd Child". If the user clicks Yes on this, the fields "2nd child's name" and "2nd Child's Age" appear. Again, the age is a fee field, with choices. However, the fee selected here is not added to the total.
Is this a bug? Or am I doing something wrong?

I don't know what's changed, but it's working now!