How are Budget Surpluses and Deficits Calculated?

[DigitalOxygen.ca]

When a budget says "$xxx over spent" or "$xxx remaining" how are those figures calculated?

For example at the end of September the numbers in my budget looked like this...

Income: $3,871.46 / $3,475
Expense: $3,974.46 / $3,532.91

.. and it says I overspent by $141.55. Obvious I did overspend but not by that amount according to the high-level information listed at the top of the Income and Expense lists. No matter which of the above values I subtract from one another I cannot come up with that number.

How does iCompta calculate the overall state of the budget?

[Angeman]

This information only use the expenses so it should be $3,532.91 - $3,974.46 but obviously something goes wrong here. Do you have the same problem with the previous months of your budget ?