Mullion Placement/Position

[dm0144]

Hello,

Can someone help me how to center the mullions at the end of the curtain wall (red in the sketch)?

In general, how do I control the position of the mullion in the direction parallel to the curtain wall?

Also, why do I get the arbitrary cuts in the curtain wall panel (blue in the sketch)?

[barthbradley]

Is this what you  are after? 

[dm0144]

@barthbradley  Centered mullions and continuous curtain panel

[barthbradley]

Two Curtain Walls then.  

...this?

[ToanDN]

To run panels in front of mullions, edit the mullion profile and move it so that the center front back ref plane does not intersect the mullion sketch.

Revit 2022 file is attached.