How does the bidding system work?

[dv8r]

You win the bid if you are the only bidder in the round or if you are the highest bidder and no one bid in the current round.

You only need to bid once in a round, that's enough to qualify for the next round.

[n0nam3]

yes, however, when i bid once in a round, i go to the next round. but if my rival outbid me in the same round, he wins the player. how is that so?