My legal name is different than what I go by. I really don't care which one people use and I let people know that.

Now I have this co-worker who constantly will call me my legal name, then "correct" herself to my nickname. I have told her probably 4 times now that I do not care, at all, which name she uses. But it's starting to get weird that she keeps correcting herself. I don't really know why I feel that this is weird, but it makes me uncomfortable when she corrects herself like my legal name is "wrong" or something.

WIBTA if I confronted her about this and asked her just to pick one or stop correcting herself as it doesn't matter to me?