It seems there are (at least) two formats:
Last name, First name
Last name_First initial[second initial][number]
Wouldn't it be better if they all were in one consistent format?
Yes it's true that the Person ID's are not in a consistent format. This is because sometimes the program assigns them and sometimes they are added by hand. The program accepts them as they are, even when the format isn't the way it should be. But don't worry about them because they are behind the scenes, editors see them but our online users do not, the users only see the names that are attached to them.