I have fios in Herndon.
You should call them and complain (if you can actually get connected to a human being, and not an endless array of prerecorded messages) or complain to MASN. FIOS in Montgomery County, MD uses Channel 1 for MASN-2, so you should ALWAYS be able to get MASN-2. That's a reason to call MASN, so that they can call the jerks in Herndon and tell them to air what they are PAYING to air.