Menus unreliable after clicking through to nested WP installation

If you click on the page links on this site:
https://www.zionwildernesssurvivalschool.com,
they often go to the wrong page after clicking through to the nested WP blog on /news/ on the same domain.
Plus, the category links on the /news/ blog are also unreliable.

Background:

Created a website using v.2.9 at https://zionwildernesssurvivalschool.com.
Then the client wanted a second installation on the same domain in order to keep the blog part separate from the home and secondary pages.

So, I created a second MySQL db and copied all the existing files into /news/ on the same domain so that it would look exactly like the original site. Altered the new wp-config.php file to point to the new db with different username and password. Created the same pages on the new blog and redirect them to the original blog using .htaccess files at the /news/page-name/ level.

The .htaccess file for the root is:

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

The .htaccess file for the /news/ blog is nearly identical:

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

Can someone point me in the right direction on this?

Thanks!