When you want to have specific bones be free from the effects of the motion clips from the Perform, Walk or Operate tracks, you may need to set the desired bone to be Absolute.
Switch to Set Absolute Bone if you haven't already. Pick the desired bone in the panel by clicking on it in the graph, the selected bone then will be taken as Absolute. The absolute status of the bones are to be added into the Motion Layer key along with the pose data.
You may also select all the bones by checking the Select All box.
For more information about Absolute/Relative, please read Absolute and Relative Bone section.