You may be able to get the funtionality you describe by choosing Invoices in the navigation pane and filtering the selection by choosing Cient, From and To dates, as appropriate for your needs. The order in which data is displayed can be altered using the "spinner" next to Due Date to select among Due, Issued or Paid. Totals for the filtered selection are displayed at the bottom of the Invoices scene.

As is the case in most Studiometry windows, the order of items displayed can be altered by clicking on the column  title at the top of the window  Clicking a second time reorderis in the opposite direction.

You're right, this proves to be a pretty good solution. 

I've noticed a strange bug with the totals being presented in the bottom left of the window. Some times they show up, sometimes they don't... Very odd.

That IS strange. Are you Mac or Windows based? Randomly sampling various clients and periods on my Windows based setup (two networked computers) I seem always to have proper totals displayed on either computer.

We run both Mac and PC in the office and it happens on both. Bizarre. 

I'd suggest "drilling down" to the work items which comprise invoices that don't produce totals and see if there is some common thread to the kind of transactions which produce the issue.