Hi Daggio
If the png images are combined into a single object in Spriter, they will be combined into a single sprite object in C2. If you open the combined sprite object in C2, you'll see they are each their own frame of the animation. So open the Argus_battleBody sprite in C2 and you'll see two frames, one for the damaged and one regular.
C2 handles the entities correctly, but you have to set them for each instance of the object. So if you have a single *.scon/scml with with two entities, you will only import the object once. Then you place two of the spriter objects and in the object properties, (or using events) set the entity / animation for each.
You can set the entity in the layout editor using the spriter object's properties here:
<img src="http://i.imgur.com/UxJf0re.png" border="0" />