Problem with comments form and other things

Hello, I am working in a commercial website. I’m using the qtranslate plugin. I do not want comments on the site’s pages so I disabled completely all comments. The problem is that in some pages appears the comment form and in others not. When I compare the pages’s configuration in all the pages, pages with comments form and without comments form there is no difference, the settings on all pages are the same.

Also I have the problem that on those pages (with the comments form) appears a line below the page title with the creation date, author, and a “No Comments”. I also do not want that this appear on the pages. As I said earlier all the settings in all the pages are the same. With the different that some pages are with the Content/Sidebar template and other in default template and other with Content/Sidebar Half Page. But that can not be the problem because I tried with different templates but the problem still persists. I hope someone can help me because I really like to use this theme.

P.D my page is https://officiadigital.com