instance_controller using multiple skeletons

Hi, Ive been able to load static geometry using my own loader for collada that I wrote. However the next step is to add animation. The problem I am having is what do when an instance_controller has multiple skeletons. In my current model I am trying to load every node that is rigged is referencing every joint. For example

        <instance_controller url="#geom-Cylinder018-skin1">

I am not sure what I am suppose to do with this? At the moment I am linking them all to the correct nodes in the visual_scene. However every node in the model does what you see above! Ive loaded it using AssimpView just to see that it actual is rendered and that works fine. Can anybody explain to me what I am suppose to do in the above situation. Thanks