Yep, this is pretty much correct. I believe that if you vote when your not online, you can go online, and then your new voting perks will only apply to that server, but I don't think it goes on to the other servers. So if you wanted your perks to apply to Infection, you would have to make sure the first server you connect to is. Infection, and then you can go do whatever you want.
Vote @ vote.mineverse.com 1. When you vote, make sure you are in game. 2. Make sure you are a human when you vote. 3. You have to survive 1 round as a human to keep your EXP. 4. If you die, you will lose them. I prefer you to do this every time you vote. My guide to survive: Nuketown: Go to the right of where you spawn and you should see a corner where the leaves are. Wait for zombies to hit you up to the roof. Hijacked: When you spawn in Hijacked, go up the ladder on the first building you see. There are 2 corners there, 1 on the left and one on the right. Most of us use the right corner, because there are other humans there. Then you let the zombies come and hit you up the roof of the ship. Sorry, this is the best I can do on explaining this map. I picked these 2 maps, because there is a really low chance that a zombie can kill you.