can't apply a credit to a sales invoice

I've already sent this history file, and I always use snip it

it won't let me send it again, but that is the screen i get when i click into the "applied to date" "history" button

Thank you, so from the history screen, can you click the blue arrow on the first 3 lines, and take a snip of those 3 screens (the data entry screens) and post those?

I suspect the issue is around the FX and exchange rates.

Hi,

these are the only screens I can click into.

Hi mayfield , thanks for posting those screenshots.

I have created a similar series of transactions in the ClearWater sample file. The result of recording the second customer payment is that the order was overpaid by $1561.01. When I converted this to an invoice, a message appeared to say that a credit memo was being created, and an entry appeared in the settle returns and credits window, as per the attached. That credit can be refunded or applied to a future invoice.

All the transactions appear to have been recorded at the same exchange rate, so no FX variances arose. 

I can't explain why that credit entry does not appear in your system. If it doesn't, then your file may need investigation by MYOB for a repair.

After the first customer payment of NZD$8313.81, the invoice balance was NZD$17837.88. I'm guessing that the customer believed that balance was AUD when they made the second payment, so possibly they paid you AUD$17837.88, which at a similar exchange rate works out close to the $19398.89 that was recorded.