FKDAT & NFDAT in FPLT Table

Hi SAP Gurus,

Need to make a bill plan report which shows Settlement Date & To Date of the Bill plan.

I am referring to fields FKDAT (Settlement date) & NFDAT (To Date) fields in Table FPLT, but issue is that certain Sales Docs its storing settlement date in NFDAT & To Date in FKDAT and vice versa but when i go to VA screens it shows correctly.

Kindly advise how to show these data in a report or how SAP is populating this data to display in Structure RV60F.

Thanks in advance,

Saleem