Why are Hire Adjustment items not included in the Hire Statement?

Hire Adjustment items in a Time Charter invoice (bill code HIADJ) are not included in the Hire Statement as they are typically used for unsettled items, for example an unsettled off hire that the counterparty has deducted from an invoice.

As the operating party of the voyage, I have to process the invoice, with the intention of reversing it later once the off hire is settled. During the time whereby the off hire is still unsettled, I would not like this amount to be shown in the Hire Statement, so as to avoid giving the impression that the amount has been agreed on. Therefore, a Hire Adjustment would be used to represent the unsettled amount in scenarios like this.