title: magento order id increment jumps
body: <p>For some reason order ID's (increment_id on sales_flat_order table) are not incrementing subsequently on my Magento 1.6.1. This is how it looks after a number of live orders placed:</p>
  
  <pre><code>increment_id   created_at            updated_at
  100000001      2011-12-14 12:35:24   2011-12-14 12:35:25
  100000002      2011-12-14 13:02:39   2011-12-14 13:02:39
  100000003      2011-12-14 13:04:18   2011-12-14 13:04:18
  100000004      2012-02-01 16:54:58   2012-02-01 16:54:58
  100000005      2012-03-14 12:22:35   2012-03-14 12:22:35
  100000006      2012-03-20 13:10:48   2012-03-20 13:10:48
  100000011      2012-03-29 20:58:48   2012-03-29 20:58:48
  100000012      2012-03-29 21:06:43   2012-03-29 21:06:43
  100000013      2012-03-30 10:48:20   2012-03-30 10:48:21
  100000014      2012-03-30 13:05:40   2012-03-30 13:05:41
  100000015      2012-04-03 15:51:01   2012-04-03 15:51:02
  100000016      2012-04-19 15:00:49   2012-04-19 15:00:50
  100000017      2012-05-09 12:09:21   2012-05-09 12:09:22
  100000019      2012-05-24 05:35:35   2012-05-24 05:35:36
  100000020      2012-05-24 05:41:11   2012-05-24 05:41:12
  100000008      2012-05-24 05:48:52   2012-05-24 05:48:53
  </code></pre>
  
  <p>My question is why is Magento jumping increments sometimes? And worse yet, in my example order with increment 100000008 goes after 100000020. Does someone know why this is happening and if there's a way to fix it?</p>