FAGL_104 reversing the previous provision posting even though Cust Spl GL item is open

Hi,

After F103, the customer line item is cleared and the customer sp gl item is open.

After ward I run the FAGL_104 and it has made the below entry.

provision credit

sales reduction debit

Afterwards if I run the FAGL_104 again,(with the reverse tick), it makes the below entry.

provision debit

sales reduction credit

The problem is , at this point of the the sp gl item is still open. Please explain, how this entry got reversed, during the second run of

FAGL_104.

Regards

SR