*This is a very valid problem and not a "user error" one because many people start with a sky dome or inject their morphs with other things in the scene and it shouldn't make a  difference with how the figure's morphs are applied if the figure is the one that is selected.. *

Unfortunately, it is an issue.  Injecting morphs often doesn't work if the figure selected is not the first one loaded in the scene.  It's a DAZ issue, not an issue with Miette.