Hello Blush – front page- on the blog layout

This will happen when you have a sticky post.  Once removed it will not do that.

Or if you really want that post to be sticky you can remove it from the homepage loop by adding this code to your functions file at the bottom.

function hyd_remove_sticky_from_main_loop( $query ) {
if( $query->is_main_query() && ! is_admin() ) {
$query->set( 'ignore_sticky_posts', true );
}
}
add_action( 'pre_get_posts', 'hyd_remove_sticky_from_main_loop' );