The Dish Network User's Resource
Daylight Savings Time begins at 2:00 AM on Sunday Morning. At that point everyone in your designated time zone is to set their clock forward an hour. Because of the lost hour, program listings in your EPG will look wrong until the changeover has occurred. If you're concerned about event timers failing to record your favorite shows, wait until the time change occurs then check them again. Don't forget to reset your watch, clocks, VCRs, Microwave ovens, and any other device without the intelligence to do it for itself.
A bug fix for this went out for the DISHPlayer recently to help it deal with problems in this area.
If you need to record something Sunday morning that starts at 2AM, you might just want to stay up and record it manually.