光标定位输出----‘\t'格式

#include <iostream>
#include <windows.h>
#include "DoubleList.h"
#include <fstream>
using namespace std;

HANDLE hOut=GetStdHandle(STD_OUTPUT_HANDLE);   //获取句柄


void gotoxyWithFullwidth(int x,int y)   //光标定位
{
    COORD pos;
    pos.X=x;
    pos.Y=y;
    SetConsoleCursorPosition(hOut,pos);
}
void output(int x,int y){
    string name[3]={"成功者","失败地方","胆小鬼"};
    gotoxyWithFullwidth(x,y);
    cout<<"ID:"<<name[0]<<"\tname:"<<"zhang";
    gotoxyWithFullwidth(x,y+1);
    cout<<"ID:"<<name[1]<<"\tname:"<<"liu";
    gotoxyWithFullwidth(x,y+2);
    cout<<"ID:"<<name[2]<<"\tname:"<<"li";
}
int main(){    output(0,0);    output(30,0);    return 0;}  

结果：
ID:成功者      name:zhang     ID:成功者 name:zhang
ID:失败地方     name:liu      ID:失败地方     name:liu
ID:胆小鬼      name:li      ID:胆小鬼 name:li   
为什么第二次调用ouput();数据却没有对齐；