Yet another permalink disaster … two blogs don’t play along?

Hi. I want to run two blogs on one domain. So I am setting up two separate WP installs as required.

Their WordPress installation URL is:

1. https://domain.com/wp/wp-admin
2. https://domain.com/wp2/wp-admin

This works.

For both blogs, I have the website itself running from outside WP directories, so I have their “blog URLs” as follows, respectively:

1. https://domain.com/site/
2. https://domain.com/site2/

This is how I have set it up in the Options –> General in the admin in each blog.

I have also created the physical folders “site” and “site2”. And each of these folders has its own index.php. The code is as advised–for example, inside the “site” folder, the index.php is:

<?php
/* Short and sweet */
define('WP_USE_THEMES', true);
require('../wp/wp-blog-header.php');
?>

Finally, I would like to manage all the permalink stuff from within my root folder through the site wide .htaccess file, which is presently as follows:

RewriteEngine On

RewriteBase /site/
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /site/index.php [L]

RewriteBase /site2/
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /site2/index.php [L]

RewriteBase /wp2/
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /wp2/index.php [L]

RewriteBase /wp/
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /wp/index.php [L]

Both the WP admin sites are working fine. I can administer the blogs separately and properly.

But site and site2 are not working. I can see their front page fine, but when I click on an individual post link, it always ends up on site2. Even from “site”, it ends up on “site2”!

(Neither of my themes have a “404” page. But the root .htaccess has a directive `ErrorDocument 404 /’ which used to forward the user to the site’s main page if there was a 404.)

Any thoughts on what is going wrong, and how I can resolve this? I’ve been reading the manual to no avail!

Thanks so much in advance!