I'm not sure if only I can see this (you probably will see the score lol), but #1 on the leaderboard of beatmapsets/1388906 is above #2 by a couple of million points and doesn't have a full combo or high accuracy. I've watched the replay and nothing seems to be out of order besides the extremely glitched score after the song ends.
a closer look at the leaderboard:
https://imgur.com/gallery/UiEfniQ
a closer look at the leaderboard:
https://imgur.com/gallery/UiEfniQ