Okay, I follow your logic Steve, but here's my problem.
I place the first two bids at 2 minutes and 1m 45sec. Then I place the other bids at 15 second intervals after the 1 minute mark. I get that. But if all these auctions close at precisely the same time, I have no way of telling that I've won the first two auctions until all of them have closed. I won't have time to cancel the other bids, no matter how I set it up. Unless you're saying that I should cancel all the other bids with about 2 seconds left, but that's extremely risky. The only thing I can think of to do is pick the two auctions I want to bid on and hope I win them. There's no other way of doing it.
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James