That's just the client lying to you. Since you don't know which normalceus had which move, it lists all of them from both (also you linked the screenshot in the battle so).opponent had 5 moves
we were playing standard ag on the ladder on main
http://replay.pokemonshowdown.com/anythinggoes-472282463
i have a screenshot but i dont want to post it bc of private room and not wanting to leak said rooms, i can provide a screenshot in pms tho