郁闷，域名解析貌似是串了起来

www.51ganjing.com
bbs.51ganjing.com
是一个网站，www.wshenm.com这个是另一个。
为什么bbs.51ganjing.com直接解析到www.wshenm.com了？
这是51ganjing.com的规则
server {
        listen       80;
        server_name  www.51ganjing.com;
    index index.html index.htm index.php;
    root /alidata/www/phpwind;
    location ~ .*\.(php|php5)?$
    {
        #fastcgi_pass  unix:/tmp/php-cgi.sock;
        fastcgi_pass  127.0.0.1:9000;
        fastcgi_index index.php;
        include fastcgi.conf;
    }
    location ~ .*\.(gif|jpg|jpeg|png|bmp|swf)$
    {
        expires 30d;
    }
    location ~ .*\.(js|css)?$
    {
        expires 1h;
    }
    #伪静态规则
    include /alidata/server/nginx/conf/rewrite/discuz_x3.conf;
    access_log  /alidata/log/nginx/access/default.log;这个是wshenm.com的规则，是我设置的有问题吗？
server {
        listen       80;
        server_name  www.wshenm.com;
    index index.html index.htm index.php;
    root /alidata/www/zblog;
    location ~ .*\.(php|php5)?$
    {
        #fastcgi_pass  unix:/tmp/php-cgi.sock;
        fastcgi_pass  127.0.0.1:9000;
        fastcgi_index index.php;
        include fastcgi.conf;
    }
    location ~ .*\.(gif|jpg|jpeg|png|bmp|swf)$
    {
        expires 30d;
    }
    location ~ .*\.(js|css)?$
    {
        expires 1h;
    }
    #伪静态规则
    include /alidata/server/nginx/conf/rewrite/default.conf;
    access_log  /alidata/log/nginx/access/default.log;
}