title: PetaPoco query complaining about incorrect order by syntax
body: <p>Given this seemingly easy query:</p>
  
  <pre><code>var sql = Sql.Builder
               .Append("SELECT * FROM Log")
               .Append("WHERE ApplicationId=@0", 1)
               .Append("ORDER BY @0 @1", "Timestamp", "ASC");
  return _db.Page&lt;Log&gt;(1, 25, sql);
  </code></pre>
  
  <p>Incorrect syntax near '@2'. (@2 ends up evaluating to @1 in the last append)</p>
  
  <p>What am I doing wrong?</p>