Proper wp_options cron entry?

Question

My 2.9.2 site was hacked. In addition to php files, it looks like there may have been db changes.

Here's what I found in the cron entry in wp_options (after I unserialized it):

It seems a little suspicious that there is a set of 3 entries followed by a set for 1 entry. Is wp_scheduled_delete proper?

array(3) {
  [1324061037]=>
  array(3) {
    ["wp_version_check"]=>
    array(1) {
      ["40cd750bba9870f18aada2478b24840a"]=>
      array(3) {
        ["schedule"]=>
        string(10) "twicedaily"
        ["args"]=>
        array(0) {
        }
        ["interval"]=>
        int(43200)
      }
    }
    ["wp_update_plugins"]=>
    array(1) {
      ["40cd750bba9870f18aada2478b24840a"]=>
      array(3) {
        ["schedule"]=>
        string(10) "twicedaily"
        ["args"]=>
        array(0) {
        }
        ["interval"]=>
        int(43200)
      }
    }
    ["wp_update_themes"]=>
    array(1) {
      ["40cd750bba9870f18aada2478b24840a"]=>
      array(3) {
        ["schedule"]=>
        string(10) "twicedaily"
        ["args"]=>
        array(0) {
        }
        ["interval"]=>
        int(43200)
      }
    }
  }
  [1324062805]=>
  array(1) {
    ["wp_scheduled_delete"]=>
    array(1) {
      ["40cd750bba9870f18aada2478b24840a"]=>
      array(3) {
        ["schedule"]=>
        string(5) "daily"
        ["args"]=>
        array(0) {
        }
        ["interval"]=>
        int(86400)
      }
    }
  }
  ["version"]=>
  int(2)
}

The unserialized entry:

a:3:{i:1324061037;a:3:{s:16:"wp_version_check";a:1:{s:32:"40cd750bba9870f18aada2478b24840a";a:3:{s:8:"schedule";s:10:"twicedaily";s:4:"args";a:0:{}s:8:"interval";i:43200;}}s:17:"wp_update_plugins";a:1:{s:32:"40cd750bba9870f18aada2478b24840a";a:3:{s:8:"schedule";s:10:"twicedaily";s:4:"args";a:0:{}s:8:"interval";i:43200;}}s:16:"wp_update_themes";a:1:{s:32:"40cd750bba9870f18aada2478b24840a";a:3:{s:8:"schedule";s:10:"twicedaily";s:4:"args";a:0:{}s:8:"interval";i:43200;}}}i:1324062805;a:1:{s:19:"wp_scheduled_delete";a:1:{s:32:"40cd750bba9870f18aada2478b24840a";a:3:{s:8:"schedule";s:5:"daily";s:4:"args";a:0:{}s:8:"interval";i:86400;}}}s:7:"version";i:2;}