trying get titles to work as intended

_layouts/post.html

@@ -3,7 +3,7 @@ layout: default
 ---
 
 <article class="post">
-  <h1>{{ page.post.title }}</h1>
+  <h1>{{ post.post_title }}</h1>
 
   <div class="entry">
     {{ content }}

index.html

@@ -6,7 +6,7 @@ layout: default
   {% for post in site.posts %}
     <article class="post">
 
-      <h1><a href="{{ site.baseurl }}{{ post.url }}">{{ post.title }}</a></h1>
+      <h1><a href="{{ site.baseurl }}{{ post.url }}">{{ post.post_title }}</a></h1>
       <h6>Published on: {{ post.post_date | date: "%B %e, %Y" }} <br /></h6>
 
       <div class="entry">