*hits himself with Narfs hammer*
Ok, now I see it. My brain I constantly ignored the "All values are in 10ths of a percent" line.
I think this line may actualy no be correct as your results suggest, too. When you drop troops on an enemy planet it will - most of the time at least - go to "riot" regardless of what the mood was the turn before. This cannot be explained with only a 20% shift but very well with a 200% shift. Just my 0,02 €.