On the Exchange / Grid Interface, if 'One Click' is ticked, you will NOT be asked to confirm your new bets, they will be sent immediately when you click a price cell. Changing the one-click setting only affects the Exchange Grid, all ladders are permanently set to one-click by default. Please use the one-click setting with care and don't forget that you have ticked it on! Cancelling bets is also always a single-click operation, regardless of the One Click setting.
IMPORTANT: All ladders are permanently set to one-click by default and this is not user configurable. Orders will be sent immediately when you click a cell on a ladder.