It might be a good idea to change the wording of the voting prompt, just to make it clear that the voters get to pick 10 boxes this time... something along the lines of "Select ten boxes".
I know what you've written is clear enough, but it changing the wording so that it's glaringly obvious might stop people just clicking the three votes out of habit.
I know what you've written is clear enough, but it changing the wording so that it's glaringly obvious might stop people just clicking the three votes out of habit.