I thought this meant that for 10 (50) game types, you have to win 50 games against different opponents. But then it claims that for the first one, I've done "7/10", which I assume to mean that I've beaten 50 different opponents in 7 different game types; however, for the second one, I have "6/50". Which would mean I've beaten 50 different opponents in only 6 different game types.

But that doesn't make sense.

So, what does this archievement mean? Or is there a bug somewhere?