This is incredibly confusing and surely is not how it should work. Before I saw your contribution, I must have wasted several hours on the issue including over an hour on live chat. It is totally ridiculous that Bill Payments and Deposits (refunds) should be shown with the same sign. I frequently use the export facility to put transactions into a spreadsheet and this is totally thrown by this illogicality. The accounting entries for a Bill Payment are Dr Creditor account and Cr Bank account. The accounting entries for a refund are Dr Bank Account and Cr Creditor account. This surely means that Bill payments should show as negative (which they do) and Refunds should show as positive (which they do not) in the supplier account. After all, that is how they show in the bank account and, if you look at the transactions, that is how they are stored.