Hey so recently I've started using odoo, and I've installed the POS module and the Accounting module on my instance, right. then on the POS menu I added a product with the accounting configuration like this:


and then I ran a test session to sell one of this product and then closed the session. Immediately after that I went to the accounting module to generate the Profit and loss report of my product. But I was greeted by this 

I don't understand why would the balance be negatives, and why doesn't the cost of goods sold not listed under the expenses? is this normal? why isn't the sales made under debit, but instead on credit? if not how can I try to fix it! any help is appreciated