When I took over this site some of the pages had page names like:

However, there are a couple of pages that have the article number in the title - such as http://example.com/gas-burning/147.html.

Any new articles I create have the article number and not the name. I want the pages to have the names, not the numbers.

The global configuration settings are correct, at least as far as I can tell.

All thre SEO settings are checked yes, that is how it was when I took over.

I am putting a name in the alias when I am creating new articles.

What am I doing wrong?