Question about listing postdoc on NSF biosketch
Why not just contact the division rep to see if you can update the application, or if it is necessary? Obviously there will be a discrepancy among your CV and your application professional appointments sections. If this exists and a reviewer sees this error of omission, it may (sub-)consciously bias their review. 

Call one of the reps, I bet they're lonely in their D.C. office and would love to hear that phone ring XD. Rep names and ph are listed on the section webpages (e.g., there are two for Biology).

Perhaps there is a way to request edit/update or add comments to the application in FastLane (although you probably already tried this...)?