How to write multiple rule in .htaccess for multiple pages

Here is my code, it works properly for the first one but for the second one it redirects me to the blog.php

Options -Indexes
RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ blog.php/$1  [L]

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ category.php/$1  [L]

How to redirect on the category.php