A/R and Balance Sheet Balances are off

Hello!

I have noticed that the Balance showing on the A/R report, and the A/R Balance on the Balance sheet are off.

I believe there is one customer balance affecting this. When I bring up the "Customer Centre" , and pull up this specific customer, the balance total shown is $5153.31.  However, when I open the "Receive payments" it does not show this amount anywhere, and only shows that the customer owes.

When I try to fix this, both the Balance on the G/L and the subledger change, when I actually only want to reduce the amount on the G/L.  Also, when I try to fix this- I am having a problem balancing this customers account because when I try to reduce the balance I see on the "Customer center" it will create a credit- but then I have nothing to apply that credit to, and it just stays on the customer's account.

If anyone has some suggestions on how I can fix this- that would be greatly appreciated !! 

I have attached a screenshot to show what I am talking about.

Thank you, and have a great day!!

Lindsay