Thank you for the replies.
Our bylaws state that the board can appoint someone to fill a vacancy UNTIL the next AGM. The board does not have the power to elect - just appoint. Historically, after a president quit, the temporary or acting president could choose to run at the AGM and after that term of being president, would become past president. So yes , our agency would see him as the acting or temporary president - not president elect. Hope that makes sense.
As an aside, how do you flag someone in a reply?