Expense report invoice on hold

I am new to iExpense and as I am going through the setup steps, I am wondering if there is a way to put all invoices created from iExpense reports on hold so they can be released manually.

I tried going to the supply base for a particular user (who submits the expense report) and in the "invoice management" tab, I checked the box "Hold from payment" for "all invoices". I then did an expense report but upon approval it created an invoice and went in "ready for payment" status without ever going on-hold. Am I missing something?

I really appreciate your help in advance!