Form 5500 on EFAST prior to 2009

[PensionPro]

We are helping a takeover client with a DFVCP filing.  The EFAST site only goes back to 2009 filings which makes sense.  When going to the DFVCP payment web site, it lists Forms 5500 going back to 2004 as "late filings found in EFAST at this time."

Question is how are pre 2009 Forms showing up on the DFVCP site as being on the EFAST site, but they are not actually displayed on the EFAST site. Maybe the client filed electronically, but it is not displayed on the EFAST site?  In any case how do we amend those pre-2009 Forms and submit under DFVCP?  

Hope someone has experience with this.  Thank you!

[Artie M]

From DOL website  https://www.dol.gov/agencies/ebsa/about-ebsa/our-activities/resource-center/faqs/efast2-form-5500-processing