How do I select this object

Say I have X instances of a sprite. What is the proper way to select circled object:

http://i.imgur.com/El1PI8v.jpg

Put your Sprite into a Family, then you have two unique objects to work with.

This is very basic stuff - it is just that I'm experiencing some weird results. Take a look at this:

http://i.imgur.com/yJMJset.jpg

If I have 2 visible sprite instances, I'd expect variable 'count' to go up by 2 per tick - right?

Nope. That says Pick all of the sprites that are visible. Then increment your global count. You need a For each, or add Sprite.PickedCount.