301 redirect is not removing the original paths in NGINX - .htaccess

Question

I was trying to redirect a particular URL to a new URL using rewrite | 301 redirect catered by NGINX.
if ($request_uri = "/playlist/show/531a5aaefd3401705c000a32") {
rewrite ^.*$ playlist/all/ redirect;
}
If my request URI is http://servername.com/playlist/show/531a5aaefd3401705c000a32, then it should redirect to http://servername.com/playlist/all/
But what's happening right now is that it the original paths from old URL are still there:
http://servername.com/playlist/show/playlist/all/
The /playlist/show/ slashes/paths are still there, so it's redirecting to the wrong URI.
I'm pretty new in handling NGINX. Please bear with me. Thanks!
EDITS:
Here's my conf to be clearer:
server {
listen 80;
server_name site.servername.com;
server_tokens off;
charset utf-8;
root /home/site/stm/public;
location / {
index index.php;
# auth_basic "Restricted";
# auth_basic_user_file /home/site/stm/.htpasswd;
}
location = /favicon.ico {
access_log off;
log_not_found off;
empty_gif;
expires 30m;
}
if ($request_uri = "/playlist/show/531a5aaefd3401705c000a32") {
rewrite ^.*$ playlist/all/ redirect;
}
if ($request_uri = "/favicon.ico") {
rewrite ^.*$ /favicon.ico last;
}
if ($request_uri !~* ^/(?:static|favicon.ico)) {
rewrite ^.*$ /index.php last;
}
location ~ \.php$ {
include /etc/nginx/fastcgi_params;
fastcgi_pass unix:/var/run/php5-fpm.sock;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
}
}

Answer 1

You're doing it wrong: http://wiki.nginx.org/Pitfalls
You should never use if ($uri or if ($request_uri because it's just a very bad method of making location.
location =/playlist/show/531a5aaefd3401705c000a32 {
return 302 /playlist/all/;
}
Simple, fast, no regexps.
Reference to study:
http://nginx.org/r/location
Converting rewrite rules
How nginx processes a request