Let's say bidder A is currently winning with a bid of $126.50. Bidder B comes along and sets their max at $350. This is enough to beat bidder A's bid with a bid of $127.50, which you saw. In comes bidder C and says their max is $314.87, so bidder's B's bid gets bumped up to $315.87, beating C's bid, staying under their bid cap of $350, and taking the auction. You don't see $127.50 because their bid ended up getting increased automatically. It wasn't really a bid to begin with, more of a provisional bid.