Thanks MarkV,
I do understand your explanation, but probabilities suggest the shorter the price, the higher chance of the selection winning (ie I lose).
So in this particular trigger, I was hoping to lay between $9.00 and $12.00 exactly, not at average $8.90, $8.80, $8.70, or even $6.60, nor at $12.20.
The bet appears to have been placed @ $9.00 ($30/(lay_price-1)= $3.75), but then may have only been partially matched, even if it was for 5 cents, and that is where I hoped the transaction would stop, with unmatched amounts (the balance) cancelled at in-play.
Under "normal" lay circumstances, if I choose to lay at $9.00, and subsequently lay at $8.00, I acknowledge I would be pleased, but not for this trigger.
Apologies if I am confusing the issue even more, but I just want to lay within that particular price band.
If it's unattainable, I will just have to accept the odd occurrence and move on.
Thanks again for your assistance, I really appreciate it.
bobh