whether he's just lying or just can't remember doesn't make that much difference in the end to the fact that his fans don't care but should. Actually in this case, I don't think he meant to get it wrong because he was sort of backtracking when he shifted to "Biden reappointed him" but Trump being Trump, he wasn't going to correct himself, because if half the people didn't know the difference, he wasn't going to help them see it. So very deliberate in that sense.