Why does moving one side of my rigged character move the other side as well? Hi I'm new to Blender and I was trying to animate a character. I set the mesh parent to the armature with automatic weights, and when I tried to move the left arm the right arm moves in the same way (same situation with every symmetric body parts). The armature on the other side doesn't move, just the character. Could someone please help me with making each body part move independently? 

Thank you very much.
Why?

As Mike Pan mentioned- this is because you have a mirror modifier on your mesh, not your armature. 

How to fix 

Either A. Apply the modifier or B. Remove it 

-Happy Blendering!