I am in my university's co-op program and I am applying for jobs through an online job database. I recently received an email saying I was selected to be interviewed. The email listed the full names of everyone who were invited including me and three other people. From their last names, they all have same nationality as mine. According to their LinkedIn profiles, they are all former or current teaching assistants (and I am not). I asked my friend about this situation, and they were surprised that they reveal other candidate's names.
I've read interview advices on books and online, and there's no such thing as "Research your competition". So, is it normal for an interview invitation to reveal all other candidates' names? Or it's something specific to co-op or job databases?