Featured Post on Homepage is Duplicating in Blog Section

Kindly check your blog page template, I guess its being displayed twice.

Or you may share the blog template located under your theme folder.

Do you mean blog template = page.php??
And when you say under my theme folder, do you mean under theme functions?

Thank you…

Check the template used by the url
https://lisakotin.com/blog/

Via edit panel.

I think that is Loop-page.php

I cannot understand the code.

Here is the code:

<?php
/**
 * The loop that displays a page.
 *
 * The loop displays the posts and the post content. See
 * https://codex.www.ads-software.com/The_Loop to understand it and
 * https://codex.www.ads-software.com/Template_Tags to understand
 * the tags used in it.
 *
 * This can be overridden in child themes with loop-page.php.
 *
 * @package WordPress
 * @subpackage Lisa_Kotin
 * @since Lisa Kotin 1.2
 */
?>

<?php if ( have_posts() ) while ( have_posts() ) : the_post(); ?>

				<div id="post-<?php the_ID(); ?>" <?php post_class(); ?> style="border:0px !important;">
					<?php if ( is_front_page() ) { ?>
						<h1 class="heading"><?php the_title(); ?></h2>
					<?php } else { ?>
						<h1 class="heading"><?php the_title(); ?></h1>
					<?php } ?>

					<div class="entry-content">
						<?php the_content(); ?>
						<?php wp_link_pages( array( 'before' => '<div class="page-link">' . __( 'Pages:', 'lisakotin' ), 'after' => '</div>' ) ); ?>
						<?php edit_post_link( __( 'Edit', 'lisakotin' ), '<span class="edit-link">', '</span>' ); ?>
					</div><!-- .entry-content -->
				</div><!-- #post-## -->

				<?php //comments_template( '', true ); ?>

<?php endwhile; // end of the loop. ?>

It looks like I am using Featured Post Plugin. This may be where to solve issue?
I hope you can help. I am at a loss.

The plugin uses this code:
<?php query_posts($query_string."&featured=yes&posts_per_page=1");

my full homepage code is this:

get_header(); ?>

		<div class="center-left">
          <h1 class="heading">true confections: <br> a blog about sugar addiction</h1>

         <?php query_posts($query_string."&featured=yes&posts_per_page=1");
              if ( have_posts() ) while ( have_posts() ) : the_post(); ?>

            <div class="video">
           <?php if ( has_post_thumbnail()) : ?>
   <a href="<?php the_permalink(); ?>" title="<?php the_title_attribute(); ?>" >
   <?php the_post_thumbnail(); ?>
   </a>
 <?php endif; ?>
          </div>
          <div class="video-txt">
            <h2><?php the_title(); ?></h2>
            <span><?php echo get_the_date(); ?></span>
           <?php the_content(); ?>
<br>
            <a href="<?php echo site_url();?>/blog/">Click here for more Blogs >></a>
          </div>
           <?php endwhile; ?>
          <?php

wp_reset_query(); ?>
          <div class="news-sec">
            <h1 class="heading">news</h1>
            <?php
query_posts('post_type=news');
if (have_posts()) : while (have_posts()) : the_post();
?>
            <h2><?php echo get_the_date(); ?></h2>
				<p><?php the_content(); ?></p>
                <?php endwhile; ?>
<?php endif; ?>

        </div>
        </div>
        </div>

 <div class="center-right">

         <?php dynamic_sidebar( 'primary-widget-area' ); ?>

        </div>

<?php get_footer(); ?>