PM me one save file and I'll see if I can figure out why John Trevolta is lurking inside your game bud. It must be something left over from some other product but I'm pretty certain I can at least find the image/animation file name that's the root cause and from there isolate the code in the original VN scripts that's calling for it. My guess is that some other product didn't correctly release that image in the code and therefore it's remaining in your continued save throughout playthrough... but that's just a hunch.
I had a fresh install, deleted all data in the RenPy folder and unzipped folder. Had that problem with your mod too. The problem was gone when I used the SanchoModRemoved-SaveFileFix-BaDIK and no mod.
It's an easy fix anyhow. Just go into Tommy's room once the lights are stuck on, and then it will turn off.
Also, I like how in the unmodded game, the save description defaults to the path you're on. I usually turn the save description off in SanchoMod because I hate typing in a new save name each time.
It would be cool if when the save description is turned off for SanchoMod, that it would save like the unmodded game with the path automatically included in the description.