Customer and Supplier overpayment

The system indicates Supplier invoices over payment and Customer over payment both happened in September. I understand this is not correct. I have all the customer’s checks with their invoice # and none is over paid. A credit has been given automatically to an open invoice which does not apply. How can I fix this? I went to the General Journal but am not able to edit.

I noticed the error when I was going to apply a payment to a Supplier, a partial payment was applied to one of the invoices I paid. This has been going on since Sept. but just realized it. I pay my suppliers with invoice on hand. This has to be some kind of glitch… please help.

Have a look at Manager Cloud