title: left join multiplying values
body: <p>I have the following queries - </p>
  
  <pre><code>SELECT COUNT(capture_id) as count_captures 
    FROM captures 
   WHERE user_id = 9
  </code></pre>
  
  <p>...returns 5</p>
  
  <pre><code>SELECT COUNT(id) as count_items 
    FROM items 
   WHERE creator_user_id = 9
  </code></pre>
  
  <p>...returns 22</p>
  
  <p>I tried the following query - </p>
  
  <pre><code>   SELECT COUNT(capture_id) as count_captures, 
            COUNT(items.id) as count_items 
       FROM captures 
  LEFT JOIN items ON captures.user_id = items.creator_user_id 
      WHERE user_id = 9
  </code></pre>
  
  <p>...but it returns two columns both with 110 as the value. I would want 5 in one column and 22 in the other.  What am I doing wrong?</p>