You cant sort the debts into route order, buy you CAN catagorise them into individual rounds, which will make scrolling through your depts a lot easier!
Your debts are set into 2 catagories by default - "Cash Collection" & "Invoiced Items". All you need to do is change them to whatever you want eg Round1, Round2 Round3 or Area1, Area2 etc
I dont think it will catagorise your existing depts, but will take effect from the next time the job is done.