Why are listings on Zillow.com and Realtor.com different?
Zillow gets data from a variety of providers. Hundreds of different providers and their data is only as reliable as the data it receives and how the system interprets it.
Realtor.com gets its information from the local listing service. It tends to be extremely accurate. There are times it does get mixed up in the reading of the information but it is less likely to happen than it does on Zillow.
After your Realtor enters the information into the local listing system they should wait a day or so and then check the other sites that the listing is fed to. They will need to check the accurace of the information and make changes as needed.
The most accurate listing information is on the front end of the local listing systems website. Currently in my area it is MIBOR (Metropolitan Indianapolis Board of Realtors). MIBOR does not really advertise to the general public like Zillow, Trulia, Auction.com, Homes.com, and many other sites that make a majority of their money from advertsing or selling leads to Realtors and Real Estate Agents. MIBOR charges a monthly fee to the real estate agent to submit their listings.