Poll problems
 

Every once in a while I come to a poll that, even though the options for me to vote are still there, when I click on one to vote it tells me that I've already voted. My question is: why is it giving me options to vote if I've already voted? Is it just a fluke that keeps popping up?

I only get that if I click it and it then doesn't seem to respond, so I click again. Then I actually clicked it twice, so it says I already voted.