Problem with surveys in the forum.

Marta told me to solve a problem about the survey in the forum: many people couldn't vote on surveys.

I think I found out what the problem was:
when you want to vote in a survey, you don't have to open the page of the results before voting. You first have to vote and then you will see the results of voting.

The system considers this action (to see the results) as a vote.

It's really strange and I don't know why, but it is true.