Sage Timeslips

We have Timeslips 2017. This issue is actually happening no a few clients. We have noticed that sometimes especially if a client is running a credit that the amount due works out correctly in the Accounts Receivable List, but when an invoice is generated…

after running bills and putting them in proof, bills no activity or balances are included in the proof list. I'm sure it's just a setting someplace, but I'll be darned if I can find it. thanks

In the old Timeslips V12, you used to have to purge your billed transactions at the end of the year. Do I still need to purge the billed transactions in Timeslips 2017 at the end of the year?