Auction.com Counterbidding At End of Auction

[David G Vreeland]

I was the highest bidder on an auction.com listing and because the reserve was not met the site counterbid it.  The strange thing that happened at the end of the auction was that auction.com started counterbidding its own bids.  So at around 3 seconds left it counterbid itself and added 2 minutes.  It did this around 4 times before the auction ended with no buyer.  What I am trying to figure out is did the site stop counterbidding because the price had finally hit the price right before the reserve was going to be met?  Or does the system just automatically counterbid 4 to 5 times before it closes.  Also do banks just continue to lower the reserve price each time they relist a property until someone finally meets it or after a couple times will they give it to a realtor to sell?