Well i have a question about 2 things,
one: How will u get tanks to work in singleplayer if you need 2 people
two: When you get into a tank I've had this happen to me before, my avatar turns into a bot while I'm in the tank and if he dies you die, and if one round i was in a tank the next round for some reason i spawn as a tank, i don't know if this is only when i play against bots only and don't make the server on the server board thing. i do that when your server goes down and when i just feel like going against bots.