You already asked this in the srs thread?
first off, game limitation: you cant have tank and witch on intro and finale maps. exception passing map 1, and dead center 1 and swamp fever 1 posibly.. not sure about swamp.
so for intro and finale maps, you need to make up your mind, if you want tank every time, put the witch intro and finale cvars at 0. do the opposite if you want the witch.
+ you need SRS mod or confogl to actaully see tanks on all maps.
and post more detailed info for your questions otherwise you wont be getting many answers.