Revenue Recognition lines in VF44 is lost

We have advance billing concept and have revenue recognition concept for the same.The first billing is done in advance i.e amonth ahead ,then the next billing would be done in the next month ..again an advance billing.By the time the revenue for the first billing is done,the second billing is also completed as its advance billing.Hence now the revenue recogniton lines are not getting displayed in VF44 ,for the first billing doc-it disappears.Can anyone please advice as to how we could get back the lost revenue line items.

Pls help.