<font face="Arial, Helvetica, sans-serif">@thegrind,
Awesome find. However, I see that the bug is slightly different to how you describe it. I think something is not working as it should here, though.
Here is what I see:
"On touched" works correctly for me; the event causes only the Sprite in the touched Sprite2 container to rotate.
"Is touching" and "cursor is over" affects all of the Sprites, as if the trigger was affecting all of the containers at the same time. My understanding is thtat the other Sprites should not rotate - the trigger event should only pick the instance and associated container that is touched/mouse-over. Unless anyone sees my interpretation as incorrect, I suggest you submit this as a bug report with this.
Interesting that you don't see any effect with On Touched....</font>