H1 and H2 – need only home page (bad SEO)

Hi!

Please need SEO.

When I look at a page or post, I see twice H1 and H2.

<h1 class="site-title">Name Site</h1>
<h1 class="entry-title">Title post</h1>

<h2 class="site-description">Site description</h2>
<h2>Title post h2</h2>

H1 and H2 – need only home/main page:

<h1 class="site-title">Name Site</h1>
<h2 class="site-description">Site description</h2>

On other pages you need this:

<div class="site-title">Name Site</div>
<div class="site-description">Site description</div>

Am I right or not?
You can check in the themes from other authors.