Grover Cleveland was ONE president and counting him twice for being nonconsecutive about it is a stupid thing to do regardless of it being "the way we do it"
Hundreds of millions of people perpetuating the same obvious mistake and even DEFENDING it using spurious arguments is how things such as the filibuster, carceral slavery, and Donald Trump are still inflicted on the world.
I've got news for you. There's a billion things just like that lined up to annoy you, and you don't have enough time in your life to be annoyed by all of them. Each and every one of them is completely meaningless and addressing them will not make you feel better. Maybe try finding someone nice instead.
Yeah, being annoyed by one stupid small thing doesn't mean being annoyed by ALL stupid small things.
Humans tend to like and dislike specific things for their own reasons and none.
I've got news for you: trying to police what people are allowed to be annoyed about doesn't do anything except give them one more thing to be annoyed about, namely a condescending asshole trying to cluelessly "educate" them.
Maybe try to find something nice to do with your time instead.
I'm only saying all this for your benefit. I used to get hung up on stuff and it sucks. There's a million better ways to spend your time. Enjoy your annoyance since that's clearly what you're into.