' The cashout amount is what you need to lay (or back) at the current best available prices to win (or lose) the same amount regardless of the outcome. If you accept it you're placing a second bet in the opposite direction so that you win or lose the same amount. You take the offer and your interest in proceedings is over as the result is academic '
Oh I see. Betfair takes the Cashout Amount out of my betting capital and uses it to make the bet.
I thought that somehow the Cashout Amount is taken from the stakes that I already had on other bets. As you rightly say, I was overthinking it and getting into a big mess.
Thank you harry_rag