armature axes behave strange

Can somebody help me.How can I set the rotation of the bones axes right.
I am using X-axis mirror press CTRL-R in edit mode to rotate the underarm bone .
It is rotating on both arms.
When I press Tab to go in pose mode and move the bone with G it is moving strange and different not the same on the right and left side.
How can I set the bones to move in the right direction.

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Solved the problem, in pose mode I had locked the left upper arm and the left underarm (Rot Y and Z).
sorry my mistake.