title: ORA-01810: format code appears twice
body: <p>Why is the sql below generating an ORA-01810 error? I researched the error and I am using different date formats for each date insert</p>
  
  <pre><code>INSERT INTO bag_grte_clm
  (
      schd_dprt_ldt,
      arr_trpn_stn_cd,
      bkg_crtn_gdt,
      sbmt_bag_grte_clm_dt,
      bag_grte_clm_stt_cd,
      lst_updt_gts,
      bag_grte_clm_gts,
      dprt_trpn_stn_cd
  )
  VALUES (
      TO_DATE('2015/12/06', 'yyyy/mm/dd'),
      'YUL',
      TO_DATE('2015-11-15', 'yyyy-mm-dd'),
      TO_DATE('120615', 'MMDDYY'),
      'DENIAL',
      (current_timestamp),
      TO_TIMESTAMP('20151206 00:00:00', 'yyyymmdd hh:mm:ss'),
      'ATL'
  ) 
  </code></pre>