This is called an audit. I have been caught in it several times. Everytime I would go to the office and get my bill corrected, the billing computer would audit my account. According to the CSR in the local office, this would kick my bill out and recommend changes to my billing. It would then go to a local auditor person who blindly followed the computer's recommendation. I would never hear from anyone and changes would be posted to my account on dates on which I had absolutely no contact with anyone and on dates when there were no changes in my actual service. I believe this is still incorrect. See: http://customer.comcast.com/Pages/F...b&fss=cablecard&AspxAutoDetectCookieSupport=1 The way I see it , you have your primary outlet with one additional cablecard. Total charge for it should be $1.50. Then you have an additional digital outlet which should be charged at $8.50 That includes the first cablecard. You should be charge $1.50 for the second cablecard on that outlet, not $8.50 If you swap all your cablecards for M cards, then you should only see one additional digital outlet charge of $8.50. My office and comcast cares could not figure out how to program the computer to bill me correctly and I got a $20/month credit for one year. I will probably be fighting with them again in August.