F0911 is not equal to F0411

Hi All,

We implementing prepayment voucher in our company.

Here's what we do :

1. Create a prepayment voucher  (G/L Date = Des 2014)

    a. Journal in F0911 are :

             11000.11262         USD 600

                                11000.21220 (Debt Account)          USD 600

  

    b. In F0411, system create 2 records (with plus and minus value)

2. Payment for a prepayment voucher plus (G/L Date = Des 2014)

    a. Journal in F0911 are :

            11000.21220 (Debt Account)          USD 600

                               11000.11121 (Bank Account)         USD 600

3. Netting prepayment voucher minus with real voucher (gross amount = USD 800)     (G/L Date = Jan 2015)

    a. Journal in F0911 are :

            11000.21220 (Debt Account)          USD 800

                                   11000.11262                                  USD 600

                                   11000.11121 (Bank Account)           USD 200

My question is :

1. Is our setting right?

2. If our setting is OK, why there are difference between Debt Account in F0911 and R04423D?