if i moved a separated object the whole object are moved..why? I was working on an animation in Blender, and for it I was essentially breaking apart a joined mesh... however when I went to move those joined bits (I separated them using P) it worked, at first, then when I moved the animation along the whole object jumped to where I had moved the broken part...
Make sure you didn't accidentally activated the Proportional Editing Tool :


The shortcut is O.