Locked menu not working as expected

The description of the programming sounds like the buttons should work as described. Yet, as I understand it, button 2 returns to the Normal state when the user returns to the custom menu slide after completing that section. But it should be in the Visited state.

Best guess: There's a trigger that changes the state of button 2 to Normal when the timeline starts on the slide, with the condition that button 1 = Visited. That condition is met, so the trigger runs again.

FYI: A “when timeline starts” triggers runs every time the user reaches the slide—even if the Slide Properties are set to “Resume saved state.”  Therefore, if you don’t want the trigger to run in some situations, you need to add conditions to the trigger. 

If that's not the problem, well, troubleshooting is just guessing without seeing all the programming. Someone might be able to solve the issue if you upload the .story file. Here are the best practices for doing that:

• Only include slides that are related to the problem.
• Be sure objects, layers, motion paths, and variables have meaningful names.
• If there is proprietary content, replace or delete it. For example, replace proprietary text with “ipsum lorem” text.

For custom menus, I think it's better to use T/F variables to track what's been completed. Here's more info about that option: TIP: Create a Custom Menu Slide | Articulate - Community