Meaning that Hoover will get one more this year (if Trump gets elected and is counted twice), or if Harris is elected. Hoover may get another one in 2028, if somebody other than Trump or Harris is elected, and that somebody was born before Hoover’s death day in 1964. Heck, he may get another one in 2032, if that person is over 68 when elected. Or even in 2036, or even 2040.
But for each additional one that Hoover gets, Carter will also get. And then he’ll get every future President born between 1964 and 2024, or whenever he dies.
So @hajario is right. Carter will almost certainly break Hoover’s record, whenever it finally ends.