It sounded like OP lost one month due to early renewal. If that is the case, OP can call MPC to figure out the reason.

Early renewal is useful, especially for overseas members. MPC sends out renewal cards after renewal. My membership year ends in March. So far, they wait for end of March to renew and send my new membership card via SURFACE MAIL. I do not receive it until late April. If I am traveling on other OW airlines, I shall risk losing my lounge access with my expired MPC card.