Why is a billable expense being included as income on profit/loss report?

I have run a profit/loss detail report filtered to include only my Legal Fees Income and Other Income amounts, but there is one invoice in the report's date range that consists solely of a reimbursed client expense that is being counted in the income EVEN THOUGH the invoice is not being listed on the report and even though it was billable to client.

Here are the details: the client cost was paid for through the owner's personal account (before we had a business account) and then reiumbursed by the client. To record the expense, I went to the Owner Contributions register, debited the appropriate expense account and made the expense billable to the appropriate client, then credited the owner contribution account. When I created the invoice for the customer, I used the Add Time/Costs function to bill them for the expense. I just don't understand why the amount of the expense is being included in the profit loss report -- and even more so why it is being included in the amount even though the invoice is not being shown on the report.