States not showing correctly

When an object has a Normal and a Selected state, it will automatically change to Selected when it is clicked. You don't need a trigger to have that happen. 

• If it's a stand-alone object (that is, not part of a button set), it will toggle between Selected and Normal with each subsequent click. 
• If it's part of a button set, it will stay Selected until another button in the set is Selected. That's because a button set allows only one button to be Selected at a time. 
  • Here's the User Guide info about button sets: https://community.articulate.com/series/articulate-storyline-360/articles/articulate-storyline-360-user-guide-how-to-work-with-button-sets  
  • Here's info about built-in states: https://community.articulate.com/discussions/articulate-storyline/primer-take-advantage-of-built-in-states 

It looks like your rectangles aren't part of a button set. That means they all stay Selected when clicked once. And that means the extra content in the Selected states will overlap. Whichever is higher on the Timeline will obstruct the ones below it. 

If that's the case, the solution is to put all the rectangle into a button set, so that only one Selected state will show at a time. 

BTW, I also recommend giving interactive objects meaningful names. It's easier to troubleshoot when the name tells you something about the object (instead of just seeing Rectangle 2, Rectangle 3, and similar default names).