Issue with .htaccess and accessing /wp-admin

Hello,

I’m having a problem with some sites I run (3 separate WordPress installations) and their.htaccess files.

The sites are:
https://www.faitici.ca/eng
https://www.faitici.ca/fr
https://www.faitici.ca/blog

The first two sites are working fine, but I cannot access the WordPress backend (/wp-admin) for the blog site. I’m pretty sure this has to do with the content of my .htaccess file(s).

When I delete the .htaccess file for https://www.faitici.ca/blog, I am able to access wp-admin with no problem, but permalinks within the blog site point me to a 404 error on the https://www.faitici.ca/eng site.

When I put the .htaccess file back, I can’t access the wp-admin page, but permalinks/deep links within the blog site work fine.

This leads me to believe that I have an issue with my .htaccess file for the blog site. Can anyone help by telling me what should be in it? Here’s what’s in it right now:

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /blog/
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /blog/index.php [L]
</IfModule>

DirectoryIndex /blog/index.php

I also have this in the .htaccess file for the root of the site:
AddType x-mapp-php5 .php
# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /eng/index.php [L]
</IfModule>

# END WordPress

…and when I try to remove it, permalinks within the English site don’t work.

This is driving me crazy – am I wrong to think that I shouldn’t need any of these .htaccess files at all?

Thanks very much in advance for any help!