If two bidders place the same bid, the leader will be the first one to have placed this bid.
When a maximum bid is placed, it has to be higher than the bid currently showing but it can happen that it ends up being the same amount as a previous bidder's maximum bid. In this case, two bids are created with the same amount and it will be the bid that was placed earliest that will be leading the auction.
The System will clearly indicate that your bid is not the leading one in case it matches another, earlier bid.
If the bid you just placed matches another bid exactly, you will know that this bidder has reached his max bid. Therefore you will be guaranteed to have the highest bid if you now increase by one step in the bidding ladder.
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