Hi betfair winner,
Reading about your issue, one explanation could be derived from how bets below the minimum are placed.
It is my understanding, and I believe is now generally known, that to bet below the Betfair minimum takes 2 bets.
Put on £2.00 ...... BetID = 1234
Put on 0.05p ...... BetID = 5678
Cancel BetID 1234 bet leaving your
0.05p bet with BetID 5678.
What if, instead of cancelling the BetID 1234, it was simply edited to read £2.05 with the same BetID 1234.
Since now there isn't 2 bets on record, a request to cancel the 1st bet IF there's more than 1 bet on the same selection would not work and you're left with your one (£2.05) bet.
That, I think would explain it.
If it does, it then begs the question, who is doing the editing?
MFPro software?, as hard coded OR via your instructions/triggers
OR
Betfair?, to discourage/penalise/catch-out those who bet below their minimum
Hope this helps
OT