When the ODP put in the new public servers, they created multiple not-immediately-synchronized copies of the "official" working database. So there's an ODP equivalent of the "Google dance" -- different results from different servers.
SUPPOSEDLY all servers are within two weeks of up-to-date.
Note that "not being listed" is not the same as "being rejected" -- there are many reasons an editor might take no action, or take no immediately visible action, or even move the site to some other category you didn't expect, after visiting a site.
(On the other hand, note, of course, that you can't always see editors in your logs. Many very-active editors will use multiple tabs or windows, and cut-and-paste URLs so they don't have to waste time going back to the editing page.)
In other words, at best you may not ever know it's rejected, and you may not know it's been accepted for months.
This isn't a problem for editors, who can choose to re-review any site (whether or not it's been reviewed or acted on before). And it really isn't a problem for webmasters either -- what would you do differently if it were rejected? or if it were accepted? So it really doesn't matter.