Prepayment does not match unallocated

[Chris7]

I have a customer who has been overpaying for several months
All invoices are showing as paid in full and the overpayments are showing as a prepayment

I followed the process explained here:

Deleting a credit note

Hi, I am trying to correct a client entry where the customer overpaid on an invoice, the overpayment was refunded, but an unnecessary credit note was created. The credit note needs to be deleted and the refund allocated to the original invoice. Whenever I take these steps QuickFile re-creates the credit note. Please advise. Thanks.

But the prepayment is showing as about £500 less than the unallocated sum

Should they not be in balance?

[Chris7]

I worked it out - not sure if this is a bug or just ambiguous and not working the way I expected

The £1674 total actually includes amounts which are allocated (it is just a total of all the invoices) - you have to manually add the amounts in the details column which then matches the prepayment amount