I'm getting odd effects when trying to use the native importer from Poser6 and I'd like to know if this is just how it works, please.   I import a CR2 file and then click on  "Import Pose" and select a body injection PZ2.   The figure in the Assemble room changes.   Then I go to "Inject Pose" again and get the head PZ2.   The features duly appear, but the body now reverts to its original state.   If I add the MAT pose file, the head reverts to the original state (morph), although the MAT itself is applied.   If I now add the head PZ2, the face looks as though I have applied the morph twice (as, of course, I have), but if I apply the head removal PZ2, I am right back with the base figure's face, again.

Is that how it's supposed to be?

Well I don't know if it is intended. So I would consider reporting it because it can be annoying. What I do is do the posing stuff last and also save a figure setup to avoid having to apply some things over. Once in awhile some stuff breaks also. Poser format is a bit of a mess. 

No need to think outside the box....
    Just make it invisible.