@sman118, the issue was that the bone structure changed (the head was disconnected from the head bone after the first key). In order for the animation to work with reparenting, certain keyframes are automatically created. Not being able to delete those keys is a bug, though, and we will try to fix this in a future version. In the meantime, here's a fixed version of the file.https://dl.dropboxusercontent.com/u/257 ... e_000.scml
I just added the head to the neck bone in all mainline keys, and then deleting them would have worked, but I selected the head on the first key, and pressed control-D, which copies selected objects to all keys, and deletes any now unnecessary keys for the selected objects in one step.