Nginx URL virtual host rewrite issues with Magento e-commerce

I've been running into some problems with my URL rewrites. When I click a link in my Magento back-end it completely messes up the URL.

We start with this link:

http://icanttellmydomain.nl/index.php/paneel/dashboard/index/key/26f665360ac9f2e3e9b5c69b09‌​7fcb6b/

But we are redirected here:

http://icanttellmydomain.nl/index.php/paneel/permissions_user/index/key/index.php/paneel/system_config/index/key/4015c27aea900ad7fceb13e27b76560c/index.php/paneel/dashboard/index/key/26f665360ac9f2e3e9b5c69b097fcb6b/index.php/paneel/dashboard/index/key/26f665360ac9f2e3e9b5c69b097fcb6b/index.php/paneel/dashboard/index/key/26f665360ac9f2e3e9b5c69b097fcb6b/index.php/paneel/dashboard/index/key/26f665360ac9f2e3e9b5c69b097fcb6b/index.php/paneel/dashboard/index……………

It keeps repeating 'index.php' and the URL's path, looping until it gives me a 500 internal error or "The page isn't redirecting properly".

I'm pretty sure it has to do with my vhost configuration. I tried commenting:

 #Forward paths like /js/index.php/x.js to relevant handler
 #   location ~ .php/ {
 #       rewrite ^(.*.php)/ $1 last;
 #   } 

but it didn't do the trick.

My Vhost:

server {
      listen   80; ## listen for ipv4; this line is default and implied
      listen   [::]:80 default_server ipv6only=on; ## listen for ipv6
      listen 443 default ssl;

root /usr/share/nginx/www/xxxxxxxx/public/;
index index.html index.htm;

# Make site accessible from http://<serverip/domain>/
server_name xxx.xxx.xxx.xxx;

error_log  /var/log/nginx/error.log; #warn; #op warn niveau word er logged
#access_log off; #Disabled voor I/O besparing
access_log /var/log/nginx/access.log;

location / {
   index index.html index.php;
   #autoindex on;
  ## If missing pass the URI to Magento's front handler
   try_files $uri $uri/ @handler;
   expires max; ## 
}

    ## These locations need to be denied
    location ^~ /app/                { deny all; }
    location ^~ /includes/           { deny all; }
    location ^~ /lib/                { deny all; }
    location ^~ /media/downloadable/ { deny all; }
    location ^~ /pkginfo/            { deny all; }
    location ^~ /report/config.xml   { deny all; }
    location ^~ /var/                { deny all; }


## Disable .htaccess and other hidden files
location  /. {
 access_log off;
 log_not_found off;
 return 404;
 deny all;
}

## Magento uses a common front handler
    location @handler {
        rewrite / /index.php;
    }

#Forward paths like /js/index.php/x.js to relevant handler
#   location ~ .php/ {
#       rewrite ^(.*.php)/ $1 last;
#   }

##Rewrite for versioned CSS+JS via filemtime(file modification time)
location ~* ^.+\.(css|js)$ {
rewrite ^(.+)\.(\d+)\.(css|js)$ $1.$3 last;
expires 31536000s;
access_log off;
log_not_found off;
add_header Pragma public;
add_header Cache-Control "max-age=31536000, public";
}

## php-fpm parsing
location ~ \.php.*$ {

## Catch 404s that try_files miss
if (!-e $request_filename) { rewrite / /index.php last; }

## Disable cache for php files
expires        off;

## php-fpm configuration
fastcgi_pass   unix:/var/run/php5-fpm.sock;
fastcgi_param  HTTPS $https if_not_empty;
fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
include        fastcgi_params;

## Store code is located at Administration > Configuration > Manage Stores 
fastcgi_param  MAGE_RUN_CODE default;
fastcgi_param  MAGE_RUN_TYPE store;

## Tweak fastcgi buffers, just in case.
fastcgi_buffer_size 128k;
fastcgi_buffers 256 4k;
fastcgi_busy_buffers_size 256k;
fastcgi_temp_file_write_size 256k;

Thanks for reading! I'm new to all this stuff so take that into consideration in your replies please.