It's likely much more than two databases. Most MSOs outsource billing and customer service to companies like Convergent. It's a mess of legacy regions and products with different vendors involved. Try troubleshooting phone number porting -- that goes through Accenture.
You can take one of my bills -- I receive two Ecobills and a paper bill!
You can take one of my bills -- I receive two Ecobills and a paper bill!