Answer
The Sick Leave breakdown can show both the raw balance and the capped balance. This happens when unused sick leave would exceed the employee's carry-over cap.
Open Balance Breakdown and read the Sick Leave section. It shows the balance, Accrued before limit (the raw accrued amount), Carry-over limit applied (the amount trimmed), and the Carryover cap.
If the cap is wrong, update NZ sick leave carryover cap (days) in Leave Settings. If the cap is right, do not add a manual adjustment just to remove the warning; it explains why the displayed balance is lower than the raw ledger total.