Nginx proxy_pass to another port with Wordpress - wordpress

Question

My problem is following: I use Wordpress on Nginx with "pretty links". I also run 2 other services on ports 88 and 1234 and I want to make a subdomains bugs.mydomain and mail.mydomain. I did the proxypass on location / but it's working only for the main directory, anything that is after the domain/ is falling into Wordpress "pretty links" mechanism. Do you have any idea how to solve this? My config files below:
The server config:
server {
listen <IP>:80;
root /usr/share/nginx/www/domain;
index index.html index.htm index.php;
server_name domain www.domain;
location / {
try_files $uri $uri/ /index.html;
if ( $host ~ "bugs.domain" ) {
proxy_pass http://domain:88;
}
if ( $host ~ "mail.domain" ) {
proxy_pass http://domain:1234;
}
}
location /doc/ {
alias /usr/share/doc/;
autoindex on;
allow 127.0.0.1;
deny all;
}
location ~ \.php$ {
try_files $uri =404;
fastcgi_split_path_info ^(.+\.php)(/.+)$;
fastcgi_pass unix:/var/run/php5-fpm.sock;
fastcgi_index index.php;
include fastcgi_params;
}
location ~ /\.ht {
deny all;
}
include /home/domain/public_html/nginx.conf;
}
the config for specified domain (with Wordpress):
#First there is many rewrites for the W3TC plugin, like minification, caches etc
if ($host ~* ^www\.(.*))
{
set $host_without_www $1;
rewrite ^/(.*)$ $scheme://$host_without_www/$1 permanent;
}
#
# unless the request is for a valid file, send to bootstrap
if (!-e $request_filename)
{
rewrite ^(.+)$ /index.php?q=$1 last;
}
Now, when I enter domain:88 or domain:1234 it works. When I enter bugs.domain the website loads, but no CSS or images works as the url is bugs.domain/somapath and this falls into the Wordpress bootstrap. I run out of the ideas.

Answer 1

why create only 1 server with if's in it, separate the servers
server {
listen 80;
server_name bugs.example.com;
proxy_pass http://example.com:88;
}
server {
listen 80;
server_name mail.example.com;
proxy_pass http://example.com:1234;
}
server {
listen 80;
# the rest of your main server
#
}

Answer 2

So the problem was completely different then I thought. it was failing on this line:
try_files $uri $uri/ /index.html;
The problem was, that file index.html didn't exist, I only had index.php. Changing it solved the problem.