I was correct - Dish removed the SEC Alternate Feeds today (channels 596 and 597). I will update my list in the near futureThanks for all the replies. Unfortunately for me, I get back to my full time job starting tomorrow. I am teacher and summer break is over. I will still be checking for changes, but it won't be able to do it in the middle of the day like I could do over the summer - I will still make it a point to do a scan on Wednesdays, and if not Wednesday, definitely over the weekend.
Now that ESPN will be retiring the SEC Alternate feeds, I have a feeling that we will see channels 596 and 597 removed over the next couple of weeks.