Expense/Time showing up

I own a handyman business and use Quickbooks to track my time and expenses by client. I create a client and when I go to Home Depot, Menards, etc. and purchase items, I go into the "Edit Credit Card Charges" and enter Supplies for the account and the client name in the Customer:Job column ( I am using QUickbooks Pro Edition 2004). When I go into Create an Invoice and pull up that customers name, sometimes the charges show up (under Time/Costs, Expenses) and sometimes they don't. Is there something I am missing here?