Why do the figures in a Manual Scorecard not add up?

The figures in my Manual Scorecard don't add up and I wasn't warned: Our manual scorecards are designed so that they can reflect the nature of your game of cricket exactly how you entered it. Unlike other manual scorecards there won't be a warning box telling you the wides and batsmen's runs don't add up, we allow you to enter any and all information you wish in order to reflect your type of cricket match.