Problem inserting keyframe on peg layers

Every time I insert a keyframe on a Peg layer by using either F6 (or Cmnd+F6), or the “Insert Keyframe” button, it creates also a keyframe on the attached drawing layer.
But if I just move the peg with the transform tool, then it creates a keyframe only on the peg.
I don’t need keyframes on drawings - only on pegs.
How do I create keyframes without touching the mouse???

To be more specific - I need to create a keyframe on multiple layers, but without moving those drawings at all. In Flash I just klick F6 and thats it - doesn’t look like the case in TB…

Make sure to expand the peg when doing this so that it doesn’t also add a keyframe for the drawing.