This occurs when a claimant changes the cost centre on their expense trip report before resubmitting it.
When a claimant submits an expense and it is rejected, if adjustments are made to the cost centre of the expense trip report and the claimant resubmits the expense, the cost centre can change when an expense report is generated. This is because, while the claimant amended the expense trip report cost centre, the cost centre for each individual expense item was not updated.