DID monthly charge going off as 0.00

Steps to re-create.

1. Setup Reseller account
2. Log in to Reseller account
3. Purchase DID and then assign monthly cost to DID
4. As the reseller, setup a customer as prepaid with billing date on 1st of the month
5. Assign a monthly cost to DID
6. At the beginning of the month, the monthly cost for the DID will be processed but as 0.00
7. The invoice for the client is also generated with a 0.00 value and the due date of 1970-01-01

I have not yet tested this as a "non reseller" account, however, the issue is defiantly consistent on reseller accounts.