[2024] Extra 200 mr on companions

Hi everyone, I’m really confused as to why I have an extra 200 mastery rank experience for companions. I have only unlocked 2 and they are now both max level as shown correctly in the equipment breakdown on my profile. Can someone help me, this is the sort of thing that for some reason just annoys me slightly. I like my round numbers hahaha 😭 Any help is appreciated :D