What is the "total add"?
I am suspecting that you are saying the balance column in the Cash Transactions register is too low.
Have you ever tried to balance that account?
One thing that could do that is a missing transaction that would have added to the balance, such as a Dividend or a Sell.
Another thing that could do it is duplicate of a transaction that would reduce the balance, such as a check written.
You could track this down, or you could add a compensating transaction, in the Cash Transactions register, dated at about 8 years after the account started.