So on the previous page you saw what the Diagnostics Tool found.

Now let's take a look at what was actually visible to me or anyone else looking at the webpage.

This screen shot shows two of the offending <h1> tags. As you can clearly see the "Menu" title that the Diagnostics Tool found is NOT visible to me or you as the visitor.

The third <h1> tag was hiding at the bottom of the page here:

This one is visible, but I did not create this. It is a "function" of the theme that I have chosen and so it appears automatically without me doing anything.

Hopefully you can see that my theme is indeed sabotaging my SEO in two ways:

1) The "Menu" at the top is not visible and is default. In other words it is built into my theme's structure.

2) The "post navigation" buttons at the bottom of the pages are a built in "function" of the theme.