HowAboutThisOne wrote:The episodes on channel 900 might not be marked as repeat in the guide (I'm not in your zip code so I cannot see your specific guide data), so that could be the reason they are recording.
To fix this, cancel your series recording for Blue Bloods and find Blue Bloods in the Guide (DO NOT do a search for Blue Bloods using the remote or this won't work). Once found in the Guide, click OK, highlight Record and click OK, then choose "All Episodes". Now you should see the Channel option for your particular channel only.
Adding to Howaboutthisone, when you look for Blue Bloods in the guide, use the CBS affiliate (813) to set up the recording not WGN (900)