A new AP Recurring Voucher Contract needs to be created in Procurement Contracts

Hello,

PeopleSoft 9.2, Image 51, PeopleTools 8.56

We are having trouble created an AP recurring voucher type Procurement Contract. In the Invoice Options Section, there is a field called Gross Amount. It is required entry. There are 21 contract lines, and it seems like the Merchandise Amt total of all the lines needs to match the Gross Amount, otherwise there will be an error and the contract cannot be saved.

Is the Gross Amount supposed to be the same as the Contract Maximum amount? When the vouchers are created is the Merchandise Amt on the lines updated? I noticed that there are release amounts but don't understand how this is updated.