# Bizarre Outer Shell on a model? Only Appears in pose and object mode

I'm new to blender (problem 1, I know) and I've been following a tutorial on character modeling, up until now without any issues that I couldn't solve on my own, but now I've run into a tough one. This issue didn't become prevalent until I started rigging the model you see.

This is the model when in edit mode (resting pose as I've learned) but as soon as I attempt any posing with it I get a weird issue where a "ghost" starts to emerge from the body and typically follows the pose the character is doing but to a more twisted extent:

Now, there are two things to note, one being I am 90% sure this has something to do with backfaces, as this screenshot shows what it looks like after I turned on the "Backface Culling" option (before I turned it on the "Ghost" appeared as a solid version of the model with no textures, this has been the only thing to affect the ghost thus far), the other that this problem didn't occur until after I rigged it, chances are I just f'd up the rigging but I can't be too sure, so if anyone knows how to fix this issue I would be grateful!

edit: File can be found here! :

To fix it you will probably have to remove double via W in edit mode, and then the remove doubles button. Probably a good idea to recalculate your normals with ctrl+n. Then you will likely have to redo the weight painting on the bones.