What about in cases where there isn't a higher level?
What I mean is, if rather than the example I gave, it was one where the proper catagories don't share an ancestor. I'd be willing to be there are a lot of duplicate links the ODP for exactly this reason.
CNN is listed 1000 times for example... see:
http://search.dmoz.org/cgi-bin/search?search=CNN&all=no&cat=&t=s
Google is listed about 250
Ok, they are simply HUGE sites, so maybe a bad example... so I went through the directory randomly and picked a few sites and checked how many times they are listed:
Northern County Psychiatric Associates
"ncpamd.com" is listed 56 times
All Recipes is listed 390 times
http://allrecipes.com
student press is listed 4 times
studentpress.org
abcnewspapers.com listed twice
News: Newspapers: Regional: United States: Minnesota
and
Regional: North America: United States: Minnesota: Counties: Anoka: News and Media: Newspapers
I actually think this last one makes a lot of sense. Some of the others do as well, some don't. In all cases they appear to break policy.
adobe.com is listed 145 times
adobe.com/education is listed 3 times
I stress that I picked things totally randomly to do this check. In randomly checking I came across 5 sites that were only listed once... i.e. less than half.
a) Is the policy just not applied?
b) Is it up to section editors to decide if the submission is relevent enough to inlcude (regardless of where else it is)
c) Do many editors just not check?
d) Is there some level of judgement that something "belongs" that over rides the rules? (I suppose this is b phrased differently)
CNN do look a little over listed, but in general I can see the point of multiple listings in these cases. For comparison (with other media):
abc.go.com (ABC America) is listed only 59 times
ABC.net.au (Australian ABC) is only listed 289
bbc.co.uk is listed 5256 times