I'm sorry you had a legitimate question and most of your answers were a bunch of people talking shit and not only not answering the question, but not even knowing what they are talking about.

What most likely happened is someone was waiting until the very last second to put in a bid higher than everyone else's and fucked all the other bidders over in the process. They might have even fucked themselves over too. That kind of shit makes bidding for votes always a gamble.
When you are playing with bids over 10SBD, you are playing against whales, and they are damn good at the game. You should try doing bids on multiple bots in the 3-5SBD range and see how that goes. There is a lot of room for profit, but it's too expensive for minnows and not rich enough for whales.
Or, try bidding at a different time when less bidders are awake.