The most common cause of this kind of shot result is having the wrong lighting in the room for OptiShot. So, the first thing I would suggest you do is check, and if need be, fix the lighting in the room. Information on proper lighting may be found by following the link below.
http://helpdesk.dancindogg.com/entries/20371003-installation-environment
Another possibility is that OptiShot is having a hard time reading a particular driver. We have found that drivers with a smooth and reflective bottom will yield more accurate results with OptiShot than those with an irregular and non reflective bottom.
Still another possibility, though uncommon, is that the Swing Pad has been damaged. If your lighting is properly set up and you are still having an issue try running OptiShot with the Swing Pad connected and turn off or at least dim all the lights in the room and observe the infrared sensors. With the exception of the Green/Red status light, every other bulb should glow faintly red. If some are out that should be lit then the Swing Pad should be replaced.