why are units in this building listed twice in ZillowAn example - Unit 3 at 1725 Washington St. SF 94109http://www.zillow.com/homedetails/1725-Washington-St-IT3-San-Francisco-CA-94109/79847410_zpid/this is the SAME unithttp://www.zillow.com/homes/San-Francisco-CA/1725-Washington-St-APT-3/2126873968_zpid/June 12 2012 - Nob Hill00YesReport a ProblemProblemSelect oneOffensive contentIrrelevant contentSpam (pure self-promotion)OtherDetailsYour emailPlease enter a valid email address.Submit CancelContent flaggedWe will review this content. Thanks for helping make the site more useful to everyone. To learn more, read Zillow's Good Neighbor Policy.We're sorry. This service is temporarily unavailable. Please come back later and try again.