301跳转错误，何故？

域名：www.aaa.com
论坛：bbs.aaa.com
正常应该是输入aaa.com就直接打开www.aaa.com，但现在是输入aaa.com打开的却是bbs.aaa.com，何故？是解析的问题还是nginx配置文件的问题？nginx配置文件如下：
server_name www.aaa.com www.bbb.com;
  if ($host = "47.94.xx.xx") { rewrite ^(.*)/$ https://www.aaa.com/$1 permanent; }
  access_log /data/wwwlogs/www.aaa.com_nginx.log combined;
  index index.html index.htm index.php;
  root /data/wwwroot/www.aaa.com/public;
  if ($ssl_protocol = "") { return 301 https://$host$request_uri; }

  include /usr/local/nginx/conf/rewrite/laravel.conf;
  #error_page 404 /404.html;
  #error_page 502 /502.html; server_name bbs.aaa.com bbs.bbb.com;
  if ($host = "47.94.xx.xx") { rewrite ^(.*)/$ https://www.aaa.com/$1 permanent; }
  access_log /data/wwwlogs/bbs.aaa.com_nginx.log combined;
  index index.html index.htm index.php;
  root /data/wwwroot/bbs.aaa.com;
  if ($ssl_protocol = "") { return 301 https://$host$request_uri; }

  include /usr/local/nginx/conf/rewrite/discuz.conf;
  #error_page 404 /404.html;
  #error_page 502 /502.html;