Tonight the hiccup happened again. I've enabled logging as you requested (verbose and all).

Each job has a sequence with 20 lights.
Starting conditions of the mosaic panels 1 to 4: 40, 24, 20, 20 lights respectively.
Result: 40, 41, 20, 20 lights.
What is strange: 41 lights in the second panel (starting at 24) not 40, not 44 (24+20)...

Please help me out, this is frustrating to say the least. (us Dutch people don't have the luxury of many clear nights ).

Picture of the analysis tab: