I have set-up an .htaccess file (listed below) for a newly designed website (the domain has been up for years). One of the errors I am receiving is when a visitor goes to the URL http://example.com/Newsletters/5765-2005.pdf they should be directed to http://example.com/newsletters/5765-2005.pdf (small "n" in "newsletters"). But they somehow are redirected to http://example.com/articles/letters/5765-2005.pdf

The sub-directory "letters" does not exist, nor is it listed in the .htaccess file, unless it is shortening the "newsletters" directory and placing the "articles" directory in front of it.

I have tried the page at http://web-sniffer.net/ and it says it's a 301 permanent move and gives the correct directory where it has moved, i.e., http://example.com/newsletters/5765-2005.pdf

Any one have any ideas of what is going on?

.htaccess file

Code:
AddHandler application/x-httpd-php54s .php
AddHandler server-parsed .html
AddHandler server-parsed .htm

Options +SymLinksIfOwnerMatch
RewriteEngine on
RewriteBase /
ServerSignature Off
Options ExecCGI Includes IncludesNOEXEC SymLinksIfOwnerMatch -Indexes

# backward compatibility ruleset for rewriting document.htm to document.php
RewriteRule   ^(.*)\.htm$              $1      [C,E=WasHTML:yes]
RewriteCond   %{REQUEST_FILENAME}.php -f
RewriteRule   ^(.*)$ $1.php                   [S=1,R]
RewriteCond   %{ENV:WasHTML}            ^yes$
RewriteRule   ^(.*)$ $1.htm

# Blocks access from libwww-perl user-agents and URLS which include the command "=http:"
RewriteCond %{HTTP_USER_AGENT} libwww [NC,OR]
RewriteCond %{QUERY_STRING} ^(.*)=http [NC]
RewriteRule ^(.*)$ - [F,L]

# Redirect www to non-www
RewriteCond %{HTTP_HOST} ^www.example.com$  [NC]
RewriteRule ^(.*)$ http://example.com/$1 [R=301,L]

# Prevent hotlinking of images
RewriteCond %{HTTP_REFERER} !^$
RewriteCond %{HTTP_REFERER} !^http://(www\.)?example\.org/.*$ [NC]
RewriteRule \.(gif|jpg|swf|flv|png)$ /feed/ [R=302,L]

# Used for the errorpage.php file
ErrorDocument 400 /errorpage.php
ErrorDocument 401 /errorpage.php
ErrorDocument 403 /errorpage.php
ErrorDocument 404 /errorpage.php
ErrorDocument 500 /errorpage.php

# Caching
# ExpiresActive On
# ExpiresDefault A0
<ifModule mod_headers.c>
# 1 YEAR
<filesMatch ".(ico|pdf|flv)$">
Header set Cache-Control "max-age=29030400, public"
</filesMatch>
# 1 WEEK
<filesMatch ".(jpg|jpeg|png|gif|swf|css|js)$">
Header set Cache-Control "max-age=604800, public"
</filesMatch>
# 2 DAYS
<filesMatch ".(xml|txt)$">
Header set Cache-Control "max-age=172800, proxy-revalidate"
</filesMatch>
# 1 MIN
<filesMatch ".(html|htm|php)$">
Header set Cache-Control "max-age=60, private, proxy-revalidate"
</filesMatch>
</ifModule>
<ifModule mod_expires.c>
# any Expires Directives go here
</ifModule>
# End Caching

# compress text, html, javascript, css, xml:
FilterDeclare   COMPRESS
FilterProvider  COMPRESS  DEFLATE resp=Content-Type $text/html
FilterProvider  COMPRESS  DEFLATE resp=Content-Type $text/css
FilterProvider  COMPRESS  DEFLATE resp=Content-Type $text/javascript
FilterChain     COMPRESS
FilterProtocol  COMPRESS  DEFLATE change=yes;byteranges=no
# <IfModule mod_deflate.c>
# AddOutputFilterByType DEFLATE text/plain
# AddOutputFilterByType DEFLATE text/html
# AddOutputFilterByType DEFLATE text/xml
# AddOutputFilterByType DEFLATE text/css
# AddOutputFilterByType DEFLATE application/xml
# AddOutputFilterByType DEFLATE application/xhtml+xml
# AddOutputFilterByType DEFLATE application/rss+xml
# AddOutputFilterByType DEFLATE application/javascript
# AddOutputFilterByType DEFLATE application/x-javascript
# </IfModule>

# <Files 403.shtml>
# order allow,deny
# allow from all
# </Files>

<Files php.ini>
Order allow,deny
Deny from all
</Files>

RewriteRule ^Articles/?(.*)$ http://example.com/articles/$1 [R=301,L]
RewriteRule ^Events/?(.*)$ http://example.com/events/$1 [R=301,L]
RewriteRule ^News/?(.*)$ http://example.com/articles/$1 [R=301,L]
RewriteRule ^Newsletters/?(.*)$ http://example.com/newsletters/$1 [R=301,L]