From now on, all your votes with the same weight will give the same reward until you run out of voting mana, so if you want to reflect the old behaviour you should decrease your weight by 2% everytime you vote. If you keep your strategy you will actually reward a bit more because voting order won't affect the rewards. I mean, until now, your tenth vote, even though it was 100%, did not have the same impact as your first vote with full mana.