Grand total still not adding up correctly

I have tried and mad all changes suggested and when I go online and create an application as one of your parents would the total for the first child seems to work fine but when I go to add a second or third child it is still adding extra cost on to the grand total when I check out.  How can I fix this?  

Are you referring to the Total displayed on the 3rd page is not matching with the Grand Total in the 4th page? I have tried selecting some options on the form and see that there is a difference.

I have counted the number of fields added in both of these calculation widgets and see that there is a difference. The Grand Total is having more fields added than the Total field. Could you confirm if these two fields are calculating the same fields? If so, could you let us know why we are calculating twice instead using the Total field in the Payment field or in the Grand Total?

Thanks!