Hi! There are actually many factors that can contribute to the amount of rewards you earn and is not just based on your own individual Win Streak. As can be shown here:

Winning Streaks allow players to claim extra rewards but they are determined based on the winning streak your opponents manage to earn, as well as the result of the three battlefield. The battlefield that wins the event will receive extra rewards in comparison to fields that did not. Many factors contribute, terribly sorry for the confusion and I hope this helps!

~Jib

Jib Edit: Please ask if you have any questions, I will try my best to help =p

First Place- 18 advanced refine, 1 SS

Second Place- 12 advanced refine, 1 SS

Third Place- 6 advanced refine, 1 SS

The higher points you have, the more ranked battle point you gain

if you are in the strong sageworld battlefield (high level players) the 1st place can get 20 adv refine rune. Then in another sageworld that has lower level players, the reward of the 1st place will be reduced to 18 adv refine runes.