First I vote Casper spooky has too many politically unfriendly issues! Next it sounds as if there is a short in the light circuit. If the switch is off and is wired correctly and the bulbs are good and not trick bulbs then the power has to come from somewhere! It may be time to call the long island lady and let her have a chat with the ghosties! My awesome and very smart mate said sounds more like Mickey and his family are on vacation in your airstream!
Gotta get busy! Have a great day! Now where did I put those revits?