What I can't understand is why the code is deleting the sprite3 instances with different IDs with only one trigger.
Ops, there was a mistake on the code, my bad.
Here is what is happening:
The first code is working fine;
<img src="https://dl.dropbox.com/u/47035927/temp/sample1.png" border="0" />
The second code is setting the Scenario Mask with ID = 4 to be with the height = 225 when you press the Button with ID = 1, but how it's happening if it's inside a code where is checking the Button ID = 4 and not ID = 1? It's wrong? I'm misunderstanding the event system?
<img src="https://dl.dropbox.com/u/47035927/temp/sample2.png" border="0" />
Sample file is on the same link, updated: dl.dropbox.com/u/47035927/temp/instances.capx