try fixing placement

contrib/static/site.css

@@ -252,6 +252,9 @@ html {
     background: grey;
 }
 
-#posts_graph ,  #overview {
+#posts_graph , #board_graph {
     float: left;
+}
+#overview  {
+    float: right;
 }

contrib/templates/default/frontpage.mustache

@@ -32,6 +32,8 @@
       <div class="index-inner">
         <!-- begin posts graph -->
         {{{postsgraph.Render}}}
+        <!-- begin overview -->
+        {{{overview.Render}}}
         <!-- begin board graph -->
         {{! todo: move boardgraph into its own file like postsgraph }}
         <table id="board_graph">
@@ -60,9 +62,6 @@
             {{/ boardgraph}}
           </tbody>
         </table>
-        <!-- begin overview -->
-        {{{overview.Render}}}
-
       </div>
     </div>
     </center>