One more thing.  When I save the PZ3 with the extra node in their and then reopen it - it goes away. I guess when you save the file it knows to not duplicate however this is where i believe the corruption is coming in. 

I still have no idea where the animation palette settings are in the PZ3.  Clearly they come back when you open it but I can't find it when I am editing it. Something tells me that is where the problem is.

Windows 10 - Poser Pro 2012 - 64Bit - 24GB RAM - 4 x 3.40 GHZ processor