When i play the daily tournments i win about 1/3 of the battles i have, but the points dont add and it stays very low.
i dont get to the top 1/3 anymore although i think i should had enogh points for it but most of them just dont add.
The only way to accurately determine your score is to keep track of it yourself.
also, your battle history should display the value of each battle.
there is also the potential that you leave a battle or time out.
since you have a fair play rating of 90%, 10% expired battles, there is a good chance that you time out in at least one of your battles per tournament. if this happens, your score is lowered...
I think the score is lowered by 10 points for leaving battle, and 20 points for timing out, but i'm not 100% sure...
i think it is listed somewhere.