3-10-8 is the T&M Summary that shows the totals billed against each cost code and compares it to the contract values on the 6-1-11 Proposal by cost code.

3-10-7 is the T&M journal which shows the individual amounts billed by cost code.

Unfortunately, those reports are not matching against the total A/R billed to clients. 

Then someone has been billing outside the T&M module on that job

If you're charging a markup that is calculated on the invoice total and shown at the end of the T&M invoice, the T&M reports don't pull that total for some reason. I run the T&M Summary to Excel, then preview 6-1-4-71 Job Income Statement. Subtract the total on the T&M Summary from the Contract Billed on the Job Income Statement, and that will give you the markup amount that has been billed. We include a line item in the Proposal/Budget called Contractor Fee to enter this amount to on the T&M Summary, and everything balances.