Auctions.com - What does it mean if it sells at starting bid and get back to market?

[Raman Bindlish]

I am new in property investing and trying to just learn from observations and researching a little bit. I was looking at a Foreclosure property on Auctions.com. This place went on sale in February and Zillow shows the history as "Pending Sale" and "Back in Market" the very next day. All the time, it is bid at starting bid itself. Is it someone bidding and not paying?