Finding transaction responsible for owing client money

Tut,

I have been looking the system from past many days and have very hard time to find out the transaction where Manager.io is thinking that I owe a client $153 and applying it to the new invoice for a specific customer.

What screenshots may I upload for you to eye on it?

First, please do not divert topics with unrelated questions. This question has nothing to do with sales invoices being paid in full. I have moved it to a new topic so it gets more visibility.

As for your question, which edition (desktop, server, or cloud) are you using and what version number? To track down what is going on, show screenshots of both the Edit and View screens for the invoice in question. Also, go to the Customers tab and click on the blue balance (or hyphen, if the balance is zero) under Accounts receivable for the customer. Post a screen shot of the list that appears.