Can someone explain the ranking system to me?

[IronMagus]

I'm so confused. I'm in the Gifted league, Strong Beads division. Ranked #46 with 105 points. The leaderboard goes from 0 points for 100th place up to like 750 or so for 1st.

My opponent in a match I just finished is also in the Gifted league, but they're in the Grey Rock division instead. They are ranked #49 with 137 points. Their leaderboard goes from 0 points again up to around 1150.

What does any of that mean? They have more points, but are ranked lower, and in a different (higher? lower? who knows...) division altogether. How do I rank compared to this opponent, and how am I supposed to know that?