In this map im making, whenever i try build it it comes up with a leak for no reason. normally its a structure, like the om or rc, but sometimes its a light THAT IS IN THE MIDDLE OF SPACE, eg:
__________________
| |_____________| |
| | | |
| | * | |
| |_____________| |
|_|_____________|_|
* = Light
and no, im not a newb who makes a map without a roof or floor and goes crazy when they cant build it, but im not an Uber-Pro Builder either

ive tried lotsa stuff and nothings worked, so the answer must be something ive never heard about or sumthing.
Help?