Commitment not applied to all order lines

Hi,

We have a Deposit that we have mentioned on 4 orders each having multiple lines and each line having the commitment number. The Deposit amount is an exact match of all these 4 orders. However in the 4 invoices, 2 have been totally closed by the Deposit whereas for the remaining two only the equivalent amount of their first line has been closed by the Deposit. The Deposit still has available Deposit balance and the Commitment tab of the 2 invoices that are still open are grayed out not allowing us to manually apply the commitment.