[Content] Sunday Night Football changes to Spanish commentators

Here's a good one for you Comcast, and no, I'm not hallucinating. EVERY Sunday night while watching Sunday Night Football on my NBC HD channel here in Harford County, MD, the sports commentary changes to the Spanish announcers at exactly 11:30 p.m. All I need to do to get it back to Cris Collingsworth and Al Michaels is change the channel and then change it right back, and I have English again. This problem manifests itself EVERY Sunday night at EXACTLY 11:30. Obviously my workaround is simple enough, but you have some very bizarre anomaly in your system causing this. I've called and reported it, but I think the service rep thought I was a few fries short of a Happy Meal.