Odd bug

I don't know where else to ask this.  I've been experiencing a bug for a long time now, with the ceiling lighting.  most, not all but most of my ceiling lighting - both CC and vanilla - show a light above them, which pierces the ceiling and show up on the upper floor.  It's like when you diminish or enlarge a light and the light points stay fixed in its old position. 

It started with some CC - then it seemed to bleed out, even to vanilla lights.  This has been happening across several versions of the game, which means I've recreate the data folder several times now.  I've run the S4S light batch fix multiple times but it never fixes it either.  Does anyone have any idea what might cause this?

Thank you.