Split bill recurring



I have created a split bill rule (that has six secondary clients) as recurring per the Help information that states:  "Timeslips automatically recreates the split billing rule after the clients associated with it have been included on an approved bill."  I am now in need of sending another bill to the clients on the same matter, but cannot get the secondary bills to generate.  The primary bill does display the client/split bill information for the new charges, but none of the secondary bills are generated.  If I try to create a duplicate primary, it does not duplicate the secondary clients.  How can I get the secondary bills to generate?

Thank you!