Extra level showing up in HTML5 Output

I re-created my TOC and now it's working! 

Let's have a look at the actual FM doc for that "Safety Standards Used for.." doc - what's in there that's triggering the heading...

I am now updated and still having the same problem.

I am now updated to 15.0.4.751 and still having the same problem.

Here is what it looks like when I try the charcoal layout. Same problem.

And can you update to the latest update 15.0.4.751?

Hi,

Does the TOC for PDF work perfectly? We too had a similar problem with the HTML5 output but solved it by creating a proper TOC for the book. Please also ensure that the Add all Topics... checkbox is selected in the Style Mapping of HTML output. 

Regards

Apurva

I think that's a bit behind - try updating and regenerating.

Here is what my Frame book looks like. The HTML output seems to be making a navigation heading for each group I have in the Frame book because the "Frontmatter" heading is NOT in my TOC, but it is a group in my FrameMaker book as shown below.

I'm using the 2019 release version 15.0.2.503. I'm using Azure_blue layout. I'll try the Charcoal layout and see.