usually the short sale is in one department and the potential foreclosure in another department. please have your representative make sure they are aware of the short sale. obtain short sale approval and close quickly. BOA will more than likely continue with the foreclosure process to ensure its process thus the advertisement on auction.com
This site advertises short sales, foreclosures, pre-foreclosures, etc. The short sale department and foreclosure departments at banks rarely communicate. So their may be pre-foreclosure proceedings in process, or the site may just be advertising it because it has been recorded in the county records that the mortgage is delinquent.
Have your Realtor contact the listing Realtor and/or negotiator and have them check in with the foreclosure department with the lender to make sure there is NOT a foreclosure sale date pending. If there is, and you also have an active short sale file, you'll want to connect those two departments to get the foreclosure postponed.