Payment issue

[Dessire V]

I keep having this issue--I made a mistake applying a payment, if I edit the payment it adds the same amount due twice to the invoice. If I delete it, it sends it back to the original balance due instead of a partial payment, this specific invoice has 5 payments and I had added two payments when one was still pending. If I issue a credit and have to send the statement to the customer, they'll question what it is as it shows there and I don't want it to make it seem like I'm overcharging or doing something I shouldn't. 

[Zack J]

I'm having a similar issue. My payments are not showing up on my invoices. When making a partial payment the system is paying in full. Deleting and applying payment again has completely screwed up my customers payment history as the deleted payments still show up in some form.