Is there a way to get the survey field book XML export / import to recognize an edited compound curve (arc to arc)?

I'm processing data in segments then assembling the corridor segments into a master DGN so I've been exporting an XML of the segment after edits. I seem to be losing the arc edits that I've already made when importing into the master file. Using 08.11.09.832 SS4. The XML writer reports as LandXML version 1.2