I'm working with Illustrator CS6.
When I apply a single drop shadow to an object everything is peachy, like with this red stroke drop shadow, with no blurring:
This green drop shadow with 0.4 mm blurring is OK as well:
But when I apply both drop shadows to the letter's stroke things get weird. First, the red drop shadow not only is applied to the letter, but also to the green drop shadow. Next, despite the red drop shadow having no blurring, it adds width to its rendering of the green drop shadow, but the blur is lost:
So, instead of having 2 (independent) drop shadows, I have 3. If you create 3 drop shadows the artwork will show 7. For 4 drop shadows you get 15, and an awful mess.
Now, was this behavior (drop shadows also being applied to other drop shadows) intentional, or is this a bug? If it is a bug, was it fixed in CC? And regardless, how can I have 2 drop shadows in CS6?