I have saved out two bodies from a multi-body part.  I have created an assembly of the bodies so that I could change the position of the bodies.  I then edit the part in the assembly to create a cut extrude.  This cut extrude is not flowing back to the original multi-body part.  Not sure if this has anything to do with it, but the original multi-body part is one of multiple configurations with a save bodies feature that only applies to that configuration.

Is there a selection I have missed involving the parent-child relationship of saved bodies?  Thanks!