You may vote as many times and for as many different (s) as you like. There is no limit to the number of times you can return to the site and cast votes (within the voting time window)
You can check the "Event Information" box next to the live voting results to see specific event information (you may have to scroll on some devices).
Correct! Each visit randomly orders the (s) so that there is never an unfair advantage with respect to placement.