I supported the flag.
I didn't read the whole thread, TL;DR, but as far as I understand, OP's betting was not accepted because he placed bets late or even after the end of the match. did I understand the essence of the whole problem correctly?
isn't that the casino's fault? if according to their rules it is not allowed, why is it possible at all?
I would say that the fault lies only with the casino and its bad coding, they had to foresee it and prevent such potential abuse. they should admit a mistake in the system and if they don't want it to happen again, make corrections and disable such bets.