Have you tried the steps in http://forums.comcast.com/t5/XfinityTV-Website/Troubleshooting-TV-Listings-Issues-Not-Loading-Incorrect-Data/td-p/2150618
Is sounds like one of the filters may be selected.
Have you tried the steps in http://forums.comcast.com/t5/XfinityTV-Website/Troubleshooting-TV-Listings-Issues-Not-Loading-Incorrect-Data/td-p/2150618
Is sounds like one of the filters may be selected.