Looked @ the File...
The Joint heirchy is NOT correct...
Theres almost too many problems to list.
Here's just a few.

1. There is no joints in the body, only 8 separate skeletons for the legs. they need to be connected with a root joint. So that you can select the root and move the entire skeleton.

2. For some reason you have the leg joints parented to the leg
surface. You can parent the surface to the joints (as in robots) or if the legs were more segmented.. but not the other way around.
( it looks like you tried to parent them the correct way but selected in the wrong order) select child first.

3. But if your gonna parent the surface to the joint, you dont bind it too. one or the other.

4. when finished you should be able to bind or parent the sufaces to a single skeleton. when you move the root of the skeleton the bound surfaces should follow along. you need to get to that point before you even think about ik's.

5. then you have everything grouped together.( 8 separate skeletons that are parented to 8 separate surfaces and the body ) when you move the group it looks fine. ( even though it's all wrong ) Its only when you add the iks or try to bind- your getting a double transformation.

I'd suggest looking at some rigging/binding tutorials first.
Keep with it. The best way to learn is by doing it over..
and over... and over...
Joe