In my 21 years this happened a lot BUT the military was never affected. I ALWAYS got my pay. Simply
Paydates used to be the 31st and the 15th. They changed it once in Sept one day forward to Oct to save money in the current fiscal year. So paydates are the 1st and 15th now.
Hang in there guys... I can't believe this administration will let this go very long especially for our troops.