@KalRe 

"1) i am using refund receipt to issue refunds. And that's why it is showing the negative amount AT THE BOTTOM. Refund receipt changes the bottom mount buy not the balance due for some reason."

What do you mean "at the bottom".  The bottom of what? 

I'm not sure your understanding of double-entry accounting so if you're fluent with it, please forgive me.  Refund receipts (RR) are a standalone transaction that are used when you are issuing a refund to the customer.  When you create one, you are reducing the account selected under 'Refund From' (credit in double-entry accounting) and increasing or decreasing (debit in double-entry accounting) the account attached to the product/service selected on the RR.  That's it.  It doesn't change any amount due because it doesn't record any amount to A/R, which is the account that tracks the amount due/owed from/to your customer.  A RR is recording the payment made to your customer and the corresponding decrease or increase in your expense/income depending on what product/service you add to the RR.  In other words, the reason for the refund.  RRs do not affect the balance on your customer's account.  If there's a balance, it was not caused by a RR.

A credit memo (CM) is issued when you want to apply the credit to an existing customer invoice or a future invoice.  When you issue a CM, you are reducing the customer's A/R balance as well as decreasing/increasing the account based on what product/service you select on the CM.  If you just want to issue a refund, use a RR, not a CM.  If you have already created a CM and need to issue a refund, that's a different process.