Tomas Slancik

here is a simple example
the dependency link is snown in this case when one node's parameter references another therefore it's dependent on it

in Network Editor's View menu under Dependency Links you can choose Show for Selected or Show For All nodes

that will show you any dependencies between nodes those wires you pointed out
also you will see small arrows for input/output references outside of current path

you may want to attach a hip file

since collision field and source collision SDFs are expected to differ a bit since they are resampled into collision field and also DOP representation of volumes is different from SOP or VDB etc..

so rather than guessing what exactly you are seeing or expect, with example is easier to see what exactly is going on in your scene and why