Well, you don't HAVE to... I'm just asking for three votes in each poll. Both polls are the same round.... There's poll 1 and poll 2, due to the fact you can only have a maximum of 20 options per poll, and there are 21 entries.
Also, rules for this round are pretty lax. Since the winners will not be determined this round, it doesn't really matter much so long as the top 3 contestants from both Poll 1 and Poll 2 are reasonably determined.
In the final poll, there will be no multiple choices between the 6 remaining contestants.