Strange Session Drummer behavior

I'm new to this version of Sonar (last was back in 2006), and new also to session drummer.  I've had good success, but recently ran into a problem that I can't seem to solve.
 
Everything is fine with creating the appropriate instrument tracks (split as midi/audio).  I then use the step sequencer to create my pattern.  I place the pattern to begin at measure 2.   If I then play the song, I hear silence for measure 1, and the drums come in as planned on measure 2.
 
If I then grab the right handle of the drum clip and drag it right (to repeat/extend it), it appears to do so properly in the track view.  However, when I play the song the drums begin on measure ONE, when they should still begin on measure 2 (I only dragged to the right, not left).  There is no evidence of any events in measure one in any track.
 
This continues to happen unless I shorten the drum clip back to one instance, or drag the multi-instance clip to measure 4.
 
I've confirmed there are no other bounces of the track or any other phantom clips elsewhere.  Muting the session drummer track mutes all drum sounds in this project.
 
The song's meter is 2/4, and the step sequencer is set to 2 beats, 6 intervals.  I've already googled this and set the "Set Now Time with Full Reset", but the issue still occurs.
 
I suspect I have some type of property set on the drum clip or have something on my timeline that is causing it to think it needs to be playing in measure 1 when it shouldn't be.   As I said, I'm new to this version of Sonar and the navigation is somewhat intimidating.
 
Any help would be appreciated.  Thank you.
 

Hi. This is just a guess, but it the play button in Session Drummer (when the interface is open) active, and set to sync to host? If so that could be your issue.
All the best.

never mind