That's one of the bennies of Fastbid, as if you bid "Highest BLG WO carryover" in VIPS, you may miss a very high paying line that has some carryover.

But be sure to insert ANY Secondary at the Avg. RLG point (Secondary lines pay Avg BLG when bid Pay-only,) and Any Rsv at the RLG point, as many lines will be less than Avg. RLG and there are always a few less than RLG.

This was all covered in the "Ask Tony" thread a while back.