Triggers using variables not working

I have a project in Articulate Storyline 360. On one of the slides, I have two buttons called "Objective 1 & Objective 2" which show their respective layers when clicked. I have created variables and triggers so that when they have clicked on both buttons, another button should appear, allowing them to move to the next slide. The problem is that the button is not displaying as per the variables and triggers.

Here are some of the troubleshooting items I tried:

• Set the initial state of the button to hidden
• Created 2 variables (Objectives1Selected = False / Objectives2Selected = False)
• Created a trigger for each button (Objectives1Selected to value True when the user clicks button 1 / Objectives2Selected to value True when the user clicks button 2)
• Created a trigger for the button I would like to display once they click on both Objective 1 & Objective 2 (Set state of Oval 1 to Normal when the timeline starts on this slide. If Objectives1Selected = value True and Objectives2Selected = value True)
• Checked for conflicting triggers
• Checked the Slide Master to ensure the button is not being hidden
• Checked the order of the triggers 

I managed to get a similar one to work on one of the other slides but unfortunately nothing I try works.

Any help would be great appreciated and I have included a document with the triggers and variables.