Uber noob question - registration points

1

I’ve converted a group to a symbol, and on the stage, manually moved the pivot point so i can rotate it from an odd spot. but when I hit f6 to create another keyframe, the pivot jumps back to the center, obviously causing all sorts of animation problems. Even if I set the registration point close to the spot when converting the group to a symbol, there should be a way around it… anything ive missed?