OK, It looks like you are using the default ground plane which does do funny things with shadows. It also appears the front left corner of the table is the point directly under the light. The shadow falling to the right is logical if your light were close and the Falloff Start and End values are set very far apart - making the shadows soft-edged and cast outward. Try the same scene with a square prop instead of the ground plane and try the values for light 3 as posted above and see the difference. (I haven't moved my Geo site so I cannot post an image right now) Or,select your light 3 and hit Copy and come over here and paste the values in a post and let me see if I get different results perhaps.