How is the Annual amount calculated if there is a start and end date?
The amount added to the Annual Amount field (Employee > Employment > Position History > Adjustment) should be the amount to be given over one whole year (12 months). If an adjustment is to be given for specific months, a start and end date need to be added. The value is then divided by 12 and that balance is given for the months set out between start date and end date.
(Annual Amount / 12) * Months