ok, quite right I won a different stall but it wouldn't let me renew my other stall. I did try to hit the bid to rebid on the stall but it wouldn't accept it..... so I did hit first available.... ty for helping me!
You have to use the Bid Matching feature if you want to re-lease the same stall. Basically, if someone is bidding on your stall and you want to keep it, then you place a Match Bid to keep it. When it goes up for auction, if your Match Bid covers the highest bid, then you pay the amount of the highest bid out of your Match Bid and keep the stall. The match must be at least 1K, and if no one bids on your stall then you get to keep it another week for the minimum 1K bid.
The Match Bid is the only secret bid. This is done to mitigate abuse. Also, as a separate bid, it allows you to have a Match Bid to stay while at the same time you have another bid on a different stall to move.