New issue:

In the above picture, I entered a new Displacement Value and image into the VSS prop.

I ran Macro1 and the value got transfer correctly, but it seems because there was already an image map plugged in, it did not replace it with my new desired one. 

I would think the "Control Prop" would take precedence. 

If I don't add a map to the VSS prop, don't touch the one that's already in my figure.  But, if I do add a new map - then replace any that are already there with the new one.

Are there more reasons than not why we wouldn't want this rule?