Issue with variables and triggers

The "Additional Information" button appears on both slides in the file you uploaded. 

I noticed there is a disabled trigger to change show that button when all the Topic buttons are Visited, with the conditions that all of the associated variables = True. Here's the problem with that trigger: when the final button changes to Visited, the final variable isn't True yet. Thus, the trigger will never run. 

There are different ways to get around that issue. For example, I like to use a blank "programming" layer that has the trigger with the necessary trigger. Show that layer (with its properties set so it doesn't hide other layers) whenever one of the required buttons is clicked. This is demonstrated in the attached file. 

As for your "Next" button: On your first slide, there's only a trigger to change it to Normal when the first variable changes. But there's no trigger to change it when the second variable changes. Thus, if the user clicks the button on the left first, the Ob_Ad_2 variable won't be true yet. (The Next button will appear if the user clicks the button on the right first.) 

In any case, you're making it more complicated than it needs to be. You don't need variables at that point. Just adjust your NEXT button when the buttons on that extra layer are Visited. 

The same fix applies to the second slide.

By the way, you don't need a trigger to change a button to Visited when it is clicked. Any object with a Visited state will change to Visited when clicked. That functionality is built in. Here's more info: PRIMER: Take advantage of built-in states | Articulate - Community