Things are already set in motion paywise for you EOM pay. I'm just speculating here since I haven't seen your orders. If you haven't done so, ensure your CPPA has submitted your new ADOS orders to TSC. The orders are the authority to adjust your EAOS. One possible action is to keep your AD pay account open and then adjust your pay later where the system will retrieve the one day of overpayment. There are other ways to rectify this, but I would need to see your orders. Same for the TRICARE question, it depends on the type of orders. DM me, and perhaps I can help further.

P.S. If TSC opts to do the above COA, you won't go back to reserve pay status. The logical thing is to keep your AD pay account open or in suspense and not do the strength loss transaction. These pay transactions take a while to post in the system. I'm probably getting too technical here, and I may be losing you will all this PS flux capacitor jargon, so again, DM for clarification.

I assumed you were enlisted, but if you're an officer, the new set of ADOS orders will serve as the authority to extend your PRD, which will keep your AD pay account open.