link taking me to directory due to htaccess rule - .htaccess

Question

When I click on a specific link it takes me to the directory file listing, rather then the file its supposed to be.
Click link -> Should go to: mysite.co.uk/services/exhibitions.php (A list page of exhibitions)
Takes me to ->mysite.co.uk/services/exhibitions/ (Directory overview)
Right my direcory listing is
mysite.co.uk/services/
mysite.co.uk/services/exhibitions.php
mysite.co.uk/services/exhibitions/exhibitions1.php
mysite.co.uk/services/exhibitions/exhibitions2.php
I know its to do with my .htaccess which removes the file extension, I need this but I don't know how to get around the problem. Any ideas?
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ $1.php [L]
The final url should look like this mysite.co.uk/services/exhibitions/exhibitions1
Options +FollowSymLinks -MultiViews
Options +Indexes
AcceptPathInfo Off
RewriteEngine on
RewriteBase /
# Compress text files
<ifModule mod_deflate.c>
<filesMatch "\.(css|js|x?html?|php)$">
SetOutputFilter DEFLATE
</filesMatch>
</ifModule>
# Expire headers
<ifModule mod_expires.c>
ExpiresActive On
ExpiresDefault "access plus 1 seconds"
ExpiresByType image/x-icon "access plus 2592000 seconds"
ExpiresByType image/jpeg "access plus 2592000 seconds"
ExpiresByType image/png "access plus 2592000 seconds"
ExpiresByType image/gif "access plus 2592000 seconds"
ExpiresByType application/x-shockwave-flash "access plus 2592000 seconds"
ExpiresByType text/css "access plus 604800 seconds"
ExpiresByType text/javascript "access plus 216000 seconds"
ExpiresByType application/javascript "access plus 216000 seconds"
ExpiresByType application/x-javascript "access plus 216000 seconds"
ExpiresByType text/html "access plus 600 seconds"
ExpiresByType application/xhtml+xml "access plus 600 seconds"
</ifModule>
# BEGIN Cache-Control Headers
<ifModule mod_headers.c>
<filesMatch "\.(ico|jpe?g|png|gif|swf)$">
Header set Cache-Control "max-age=2592000, public"
</filesMatch>
<filesMatch "\.(css)$">
Header set Cache-Control "max-age=604800, public"
</filesMatch>
<filesMatch "\.(js)$">
Header set Cache-Control "max-age=216000, private"
</filesMatch>
<filesMatch "\.(x?html?|php)$">
Header set Cache-Control "max-age=600, private, must-revalidate"
</filesMatch>
</ifModule>
# BEGIN Turn ETags Off
<ifModule mod_headers.c>
Header unset ETag
</ifModule>
FileETag None
# BEGIN Remove Last-Modified Header
<ifModule mod_headers.c>
Header unset Last-Modified
</ifModule>
#ErrorCodes
ErrorDocument 404 http://mysite.co.uk/404
# force non-www domain
RewriteCond %{HTTP_HOST} ^www\.mysite\.co.uk$ [NC]
RewriteRule (.*) http://mysite.co.uk/$1 [R=301,L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ $1.php [L]

Answer 1

Try this rule for PHP extension:
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{DOCUMENT_ROOT}/$1.php -f
RewriteRule ^(.*)$ $1.php [L]