Toggling the start and end point of the lightning effect

Hello, I am editing a boxing video and I want to use the lightning effect for one of the punches. I am attempting to have the lightning rod connect with both the glove and where it strikes and adjust along a path as the glove moves through the air. The first time I try to adjust the start point of the lightning rod with the next keyframe it works perfectly, however, in the second keyframe, when I adjust the start point, the start point indicator moves where I direct it to, but the lightning rod does not and remains still in the same position as the last keyframe. Do I have to continuously adjust each additional point as I move the rod through more and more keyframes? In other words, how come the rod won't move with my starting point adjustments in each new keyframe?