You didn't get the item but were winning at close?!
Have had winning bid at close dozens of times just to find out at pickup that someone bid after close or the item "wasn't available" One of two possibilities here: - their programming sucks and the 3m extension has a que error and/or geosync timing is off -OR they're cherry picking lots and post bidding after close to sell for cash out the back door. Screen shot the winning bidder numbers and watch the pattern