Thanks for your response.

I will try to be more specific. 

This is what I think about how works the "Unapplied cash Payment Income" account. 

Every time I record a Deposit, QBO create a register using this account in the date the deposit is made. And then when I apply this deposit to an invoice QBO create the register reversing the previos one using the Unnaplied cash Payment Income account. Everything looks perfect, but the situation change in my case because I am using "Classes". 

So When I see the Profit and Loss report using "Total Only" the account "Unapplied cash Payment Income" shows "CERO", but if I see the same report By Classes it shows a balance under my class called "Service" and the same balance under "Not Specified". I know I should not pay attention to this, but try to explain this to my boss... the additional job of adding and subtracting  every time  is not what I want to explain.

The same situation happens with the "Unapplied Cash Bill Payment Expense". and this really change the value of the Net Operating Income value.

I already tried to solve this making journals but the balance of this two accounts disappear using Cash Method, but appear using Accrual method.. I need to solve this situation in a better way.

Hoping to have been clearer this time, and thanks in advance for your help.

PS. Attached is a sample showing the two register created by QBO automatically and one have the class an the other have not.