11i Collections - not re-setting the Score

11i Collections with Scoring/Strategies

Need help on the following scenario:

We defined the Scoring engine based on the Aging information, let's say:

1 - 30 days past due -  30

31-60 days past due - 20

61+  days past due   - 10

I performed the following steps:

1) I have couple invoices that were 61+ days past due and when the Collections process initially ran, Scoring Engine correctly assigned the value "10" (at the account level) with status as 'Delinquent'.

2) Now, the Customers cleared the invoices through payments and after re-running the Concurrent Programs the status changed to 'Current' and No Score - as expected

3) Now, I have new invoice in the 1-30 days past due bucket, when Concurrent Programs ran, the Score has been set to "10"