I pay bill with automatic payment every month but noticed that 'Balance Transferred From: ***' is charged in the current bill. I also noticed the account number has been changed somehow although I have not moved. I remember that I asked to correct my address sometime before because comcast had typo in my address so maybe it is related. I have not been noticed the account number change. Now I have two questions.
1. Why the Balance Transfer is charged even though I paid fully every month?
2. How can I see the previous bills after the account number change?