When I print Invoices for a range of Matters (including those deferred from billing or those with no activity) within a Client, my Cover Sheet is not including the previous balance for those Matters not being Invoiced. How can I correct this

In this instance, the system is working correctly.  The Cover Sheet has been designed to be a summary of the invoices generated in the batch.  However, if you want to include previous balances from Matters that have no current activity, you can edit your Cover Sheet to capture these.  To edit the Cover Sheet Style, open the Billing Manager and choose TOOLS, Client Cover Sheets.  Highlight the Cover Sheet Style in question and click the EDIT Button. Once the Cover Sheet Style is displayed in the Report Builder, access Settings from the menu and the following screen will appear:

Place a check mark next to the Include Bills with No Current Activity in “Client Totals” option.  Click OK to close the Settings window.  Choose File, Save from the menu to save your changes and exit the Cover Sheet Styler.

NOTE: This setting change will have no impact on Matters Deferred from Billing.  Matters must be Selected for Billing to be factored into the Billing process.