Curtain Wall Adding new Vertical mullion to parent curtain wall is cutting mullions(transom) when they should just split the Curtain wall

[FrankHolidaytoiling]

I hope the image explains my issue and it might not have a solution other than rebuilding the curtain wall from scratch.  We are creating these curtain walls and sometimes accidently placing the vertical mullion that should have gone into the parent into a nested curtain wall and its breaking all the transoms in the nested curtain wall. How can I create a mullion outside the nested panels after I have already made this error? 

[barthbradley]

Let us take a look at the file. Post it here.

[FrankHolidaytoiling]

We did have some success by placing the vertical in the adjacent bronzy panel. This split the CW, i unpinned it, then dragged it over and swapped its type without it breaking the adjacent glazed CW.

[ToanDN]

Hard  to understand but if you want to add grid or place mullion to the main curtain wall then isolate it or hide the nested one when doing so.