It's hard to help you without seeing your game. Could you share the CAPX?
How many Sad sprites do you have on your layout? Did you put Sad and Enemies in the same container?
If you did and you have many instances of Sad sprite (for example 3 enemies and 3 Sad clouds), then you may have this problem - the cloud will be showing for all 3 enemies at the same time.
I suggest you keep just 1 instance of Sad sprite, invisible by default. And not part of any container!
Then you move it and pin it from one enemy to another (as in my first screenshot).
Another way is to create a new instance of Sad sprite when you need to show it and then destroy it after it fades out.
This is how it's done in my CAPX example, and this is probably the best way to do it.