Cannot get Audition panning to work in multitrack mode.

So have no problems setting key frames on a clip.  However, when I play it back in multitrack mode, the path has zero effect on the stereo imaging.  

Have tried stereo clip in stereo channel, mono clip in mono channel.  Setting up the spline path no problem...but it has zero effect on playback.  Have only the one track active using 

Have one hint: when in Clip Editor mode, the panning works fine.  

What am I doing wrong?  Attached screen capture to show the clip and settings.  Note I removed other channel so is only left side.  Yet...it still plays to both sides in multitrack.  I don't get it.  Am new to Audition but not audio editing.  

Sure is something easy...do wish Audition had more "tool tips" when hover.  

Thanks in advance for info,

Richard