if i broadcasted a transaction that still hasn't been published over an hour later, what are the chances that if i make new transaction for the same amount and broad cast that one also that the older one might also resurface causing both to be published and twice as many coins to be transferred as intended?
> 0%
U should wait when the 1st transaction expires, then u should make sure that u r on the longest chain and send 2nd transaction.
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There is a solution to this problem, but it's not implemented in client soft - rebroadcast transactions after some period of time (shouldn't be confused with sending the same amount to the same account).
customers not going to like waiting 24 hours.
as an aside why do i need to be on the longest chain? shouldnt my transaction propagate across the whole network causing it to get included on real chains and orphan chains alike?