Pay status show as # for Prepayment Document

Hello,

We are using JDE E1 8.11 , SP1 ,some time when we make Prepayment Voucher & payment using P0413M , system allocate pay status as # for deduction line &  thus system not adjust\recover the prepayment even while making the final payment of the invoice , we do not understand how this happened? , please guide us.

Example

Prepayment made for Vendor ABC Co. by $ 100.00 - System automatically update pay status  -A to payment line & H to negative line for vendor account.

System will print cheque for Positive line by $ 100.00

By updating speed status from H to A to negative amount -$100 , system will allow to adjust\recover in future whenever final bill received , but here system allocate pay status #.