Double FI posting in Loans (CML) Installments

Dear Gurus,

We are posting installments in CML, and when we are going to verify the items in the FI module trought the transaction FBL3N the system show me double position. The system in which we are working doesn´t have activate the New GL functionality yet.

Im attaching 3 screenshoots, about the cash flow, the FI documento with one position on the account 5305200600, and the report FBL3N with two positions.

Thanks a lot and kind regards,

Ivan R. Menacho