Alternative Headline

While trouble-shooting an error in the @type Article on page, I noticed that the alternativeheadline is incorrect. It is for a different Article I created, not the one that has been applied to this page. I enable the fixed text alternativeheadline in the Schema type and write in a different string for different General Article types I have created. I only have this page under this specific Schema Type. Because the Structured Data Testing Tool doesn’t always display the Article, I don’t know if it is incorrect on the other pages or not.

What could be causing this to happen?

The page I need help with: [log in to see the link]