Quick question. I've been trying to do a motion track to use Plexus and use lights as my tracking points. Whenever I parent my lights to the Null they seem to wander or drift. I've started copying the keyframes and applying them to position of the different lights.
Is there an easier way to do this and what am I doing wrong?
Sounds like you got a bad track. Do it again, and if you're trying to do a track intuitively just fooling around with the buttons, you're hurting yourself. Go look at one of the umpteen tracking tutorials out there. Here's a good place to start: