矢量意外更改值

我正在制作一个小游戏（只是控制台），我的向量不像我认为的那样。向量的一个值只是变化，我不知道为什么。下面显示的代码是此错误的来源部分，我已经删除了显示这两个向量的其余代码，并且错误仍然出现，我不知道为什么！！这部分代码负责让敌人向随机方向传播。

/**in this part the first value of the 2 vectors are created 
(only once, I've tested it)**/
if(moves == 0){
    int randomNum1 = (rand() % HEIGHT)+1;
    int randomNum2 = (rand() % WIDTH)+1;
    _EnemysY.push_back(randomNum1);
    _EnemysX.push_back(randomNum2);
}
/**_Enemy vectors have normal values. For instance: _EnemysX[0]
is 23 and _EnemysY[0] is 12**/
/**In this part, the Enemy spreads in a random direction**/
if (moves > 3){
    //save Enemys at the border here (those who can move)
    std::vector<int> topX;
    std::vector<int> topY;
    std::vector<int> botX;
    std::vector<int> botY;
    std::vector<int> rigX;
    std::vector<int> rigY;
    std::vector<int> lefX;
    std::vector<int> lefY;
/**here, I wanna save all Fields of the Enemy where it can spread to:**/
    for (Uint it = 0; it < _EnemysY.size(); it++){          
/**_EnemysY is still normal, but _EnemysX is like: 86BF163E0**/     
        if (_map[_EnemysY[it]-1][_EnemysX[it]] == _Grenade || _map[_EnemysY[it]-1][_EnemysX[it]] == _Field){
            topY.push_back(_EnemysY[it]);
            topX.push_back(_EnemysX[it]);
        }
        if (_map[_EnemysY[it]+1][_EnemysX[it]] == _Grenade || _map[_EnemysY[it]+1][_EnemysX[it]] == _Field){
            botY.push_back(_EnemysY[it]);
            botX.push_back(_EnemysX[it]);
        }
        if (_map[_EnemysY[it]][_EnemysX[it]-1] == _Grenade || _map[_EnemysY[it]][_EnemysX[it]-1] == _Field){
            lefX.push_back(_EnemysX[it]);
            lefY.push_back(_EnemysY[it]);
        }
        if (_map[_EnemysY[it]][_EnemysX[it]+1] == _Grenade || _map[_EnemysY[it]][_EnemysX[it]+1] == _Field){
            rigX.push_back(_EnemysX[it]);
            rigY.push_back(_EnemysY[it]);
        }
    }
/**and here is a random direction created and the programm 
chooses which Field it will spread to: **/
    for (;;){
        int ranDir = (rand() % 4)+1;
        if (ranDir == 1 && !topY.empty()){
            int temp = (rand() % topY.size())+1;
            _EnemysY.push_back(topY[temp]);
            _EnemysX.push_back(topX[temp]);
            return true;
        }
        if (ranDir == 2 && !botY.empty()){
            int temp = (rand() % botY.size())+1;
            _EnemysY.push_back(botY[temp]);
            _EnemysX.push_back(botX[temp]);
            return true;
        }
        if (ranDir == 3 && !lefY.empty()){
            int temp = (rand() % lefY.size())+1;
            _EnemysY.push_back(lefY[temp]);
            _EnemysX.push_back(lefX[temp]);
            return true;
        }
        if (ranDir == 4 && !rigY.empty()){
            int temp = (rand() % rigY.size())+1;
            _EnemysY.push_back(rigY[temp]);
            _EnemysX.push_back(rigX[temp]);
            return true;
        }
    }
}