As you can see, between 2018-04-01 and 2018-05-04 there were 4 users on the Hungarian Wikipedia who made admin actions without local admin right. Two 'user groups' boxes are empty, which can mean two thing:
In my opinion, Admin Stats should mark stewards to make their actions more visible. Is it possible to mark them with S (like Admins and Bureaucrats)?
Yeah we should query global user groups, too. I think this wasn't done for performance reasons, but I am not sure. We shall investigate :)
It does at least say at the top, "Some users may be former admins, or are non-admins but have rights to make certain admin actions."
@MusikAnimal; Thanks for your work! I forgot to mention Global sysops who can create similar logs as stewards. For example, see Billinghurst's activity at urwiki. Could you implement this user group as well?
Done with 0499a26b and will go out with the next release. I will re-open and re-title this task accordingly.