vechiles dont appear

[sparkicks]

Ok i used spark edit to edit bloodgulch and i made a platform above base with a few vechiles but they dont come up on the map.they are not there. and btw i made the platform with tree logs. but when i look at them sometimes they disappear. i made the game type with 4 of each vechile and then set it as default but default just made the warthog appear and not the tank and shee. can anyone help me?