Actually missed one recently with a bid at minus ten seconds. The bid was confirmed within 2 seconds, yet it came up "Auction ended". Earlier that week I had missed something else with a similar issue, but thought it was just me and wasn't too worried as the items sold well above my high bid anyway with someone else's last minute bid. But the second time was for a game I actually wanted (and it sold well under my ten second bid). Next time I'll have to go a little earlier, seems there's something amis with the last moment bids sometimes.