There has been some chatter about the ranking system, however Flyordie does have a pretty stable system. I play a lot of Go, in real life and online, and I have come to notice that the ratings in the game are a bit different, however the point is to make the interface more user friendly, considering that children also play the game and would have difficulty understanding more advanced ranking systems.
If you really want to challenge yourself in the game just pick higher ranked players to challenge. In all fairness the game rating system does in fact have to some standard a fair rating system for game loss to game win ratios.
I hope you come to see the point in this, there isn't much that can be done.