I have multiple accounts but I only vote on 1 of them every 24 hours. I had 5 minutes left on my reset so I was occasionally checking if the timer was up by refreshing the page and trying again. I got the go to vote so I refreshed the page so I could vote on my other account but the timer got reset to 24 hours again. It's not really a big deal, I can wait the 24 hours, but I wouldn't mind being able to get my 8k nx for the day.
I just checked, I did get it. I figured I did not since it didn't take me to gtop100 site. Odd since it didn't let me vote on the account I wanted to, but it's not something to really complain about.
When you fill in your account name and click vote you have already started the voting and at that point you can' switch account to vote with.