Missing Payment Difference Reason for Down Payment Invoice

Dear experts,

In creating Bank Payment Advice,

We can see all the Payment Difference Reasons in the drop down list when we select Invoice.

1. Agreed settlement

2. Taxes

3. Cash discount

4. Currency exchange difference

5. Insolvency

But we can only see one Payment Difference Reason when we select Down payment Request.

4. Currency exchange difference.

Please advise.

Best Regards

Fred