I just checked your link for the home and I don't see where it says that your property sold in 2012. The only thing I saw was that it shows property taxes for 2012. Under homes that sold near you is a similar address but it is Street not Place that sold in 2012. Could it be possible that you were looking at this address instead? 14828 N 51st St, Scottsdale AZ 0.06 mi Single-Family Home $283,000 8/28/12.
I also checked MLS and the tax records and it does not have any information that your property has sold since your purchased it in June 1989.
Hope this helps.
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Property Management Real Estate Services