Input checkboxes with identical triggers not behaving the same

I have a few concerns with the slide. 

The last button has an extra trigger that changes the feedback back to the Incorrect state. 

Triggers have conditions that check whether objects = Normal. 

The = Normal condition doesn't always work as expected, because there's a bit of Normal in every state. So it's better to use ≠ Selected. 

Unfortunately, even when I deleted that extra trigger and changed = Normal to ≠ Selected, the feedback still wouldn't change to AllSelected when the 4th button was selected last. In other words, I can't figure out what's wrong.

• There may be something about the slide that's corrupted. You can submit a case to the Articulate staff here: Contact Support for Help with Any Articulate E-Learning Course Development Software

Fortunately, there's a simpler way to program that slide, as demonstrated in the attached file.

• The only trigger on the checkboxes is to toggle a T/F variable. (Note: The value of the variable doesn't matter. This is done to create a "when" for other triggers.) 
• The state of the rectangle (which I renamed "Feedback") is changed when the variable changes. Separate triggers with different conditions change it to the appropriate state. 

One nice thing about this method is that if you add checkboxes, it's easy to edit the set of triggers that changes the state of the object when the variable changes (instead of editing the conditions of triggers on different buttons, which gets harder to troubleshoot).