This part
<div class="publish_date">Post Date: <?php the_time('F jS, Y');?> By <?php the_author_posts_link(); ?><?php _e( ' Posted in' ); ?> <?php the_category( ', ' ); ?>· Tags: <a href="#">CSS</a> · <a href="#">Web Design</a> · <a href="#">Full Story</a></div>
</div>
should be inside the loop (just above or below your call to the_content();
), not outside
For further info and reading, check out the loop in the codex
Also, please properly indent your code. Proper indentation makes debugging easier, is easier to read, better supported by code editors and looks neater
EDIT
Here is an example of the twenty fourteen contents inside the loop
<article id="post-<?php the_ID(); ?>" <?php post_class(); ?>>
<?php twentyfourteen_post_thumbnail(); ?>
<header class="entry-header">
<?php if ( in_array( 'category', get_object_taxonomies( get_post_type() ) ) && twentyfourteen_categorized_blog() ) : ?>
<div class="entry-meta">
<span class="cat-links"><?php echo get_the_category_list( _x( ', ', 'Used between list items, there is a space after the comma.', 'twentyfourteen' ) ); ?></span>
</div>
<?php
endif;
if ( is_single() ) :
the_title( '<h1 class="entry-title">', '</h1>' );
else :
the_title( '<h1 class="entry-title"><a href="' . esc_url( get_permalink() ) . '" rel="bookmark">', '</a></h1>' );
endif;
?>
<div class="entry-meta">
<?php
if ( 'post' == get_post_type() )
twentyfourteen_posted_on();
if ( ! post_password_required() && ( comments_open() || get_comments_number() ) ) :
?>
<span class="comments-link"><?php comments_popup_link( __( 'Leave a comment', 'twentyfourteen' ), __( '1 Comment', 'twentyfourteen' ), __( '% Comments', 'twentyfourteen' ) ); ?></span>
<?php
endif;
edit_post_link( __( 'Edit', 'twentyfourteen' ), '<span class="edit-link">', '</span>' );
?>
</div><!-- .entry-meta -->
</header><!-- .entry-header -->
<?php if ( is_search() ) : ?>
<div class="entry-summary">
<?php the_excerpt(); ?>
</div><!-- .entry-summary -->
<?php else : ?>
<div class="entry-content">
<?php
the_content( __( 'Continue reading <span class="meta-nav">→</span>', 'twentyfourteen' ) );
wp_link_pages( array(
'before' => '<div class="page-links"><span class="page-links-title">' . __( 'Pages:', 'twentyfourteen' ) . '</span>',
'after' => '</div>',
'link_before' => '<span>',
'link_after' => '</span>',
) );
?>
</div><!-- .entry-content -->
<?php endif; ?>
<?php the_tags( '<footer class="entry-meta"><span class="tag-links">', '', '</span></footer>' ); ?>
</article><!-- #post-## -->