Lawfully app: I see progress on cases similar to me?!

So, I've been using Lawfully (maybe close to a year now). As you may know, Lawfully is an app that collect application information and shares the progress they make with others anonymously. So, you will declare yourself and your situation (what category you are in, filing date, ...). Then they use these information and present it in a statistical way, helping its users to do some estimation (which has been wrong in my case, and deemed not useful to me).

It also shares the status of other people with the same situation with you.

Today, I noticed a progress on two other applications in the group as mind. For the past 5-6 months, I've always been 3rd in the list of people with the same situation as me and today, I am going up in the ladder and become the 1st person in the list.

Now, my question is this: how does Lawfully categories (or groups) people in the same group? Do they have just the same "case type" (e.g., I-485) and same "case category" (e.g., EB2) as my case OR the nationality is also included in this categorization process?

I am trying to figure out if those 2 people who were in front of me were a citizen of these 19 (39) countries or not necessarily?