Pages are caching

I’ve got a pretty annoying issue, which is breaking my entire site…

If I visit certain pages, they’re showing content from another page, and highlighting that page as selected in the navigation. If I then refresh the page, the correct content shows, and the correct page is highlight.

All the time, the correct URL is being shown in the URL bar.

For example;

I click on Products in the nav, and /products is shown in the URL. However, I’m seeing content for Customers and Customers is selected in the nav. If I refresh, it all changes to Products.

If I click on Customers in the nav, then that page shows fine.

If I visit the site again, the issue occurs again.

Here’s a list of pages, and what content is being shown (until I refresh);
– Home > Home content
– Products > Customers content
– Applications > Customers content
– Customers > Customers content
– Technical > Technical content
– Distributors > Customers content
– Contact Us > Contact Us content

To throw another spanner in the works, on the Customers page, I have links to other pages (/customers/examples) – if I click on Applications, and see the Customers content, these links are then linked as /applications/examples, or /distibutors/examples when I click on Distributors.

My site is pretty basic, and built off the Roots WordPress Theme, and did have W3 Total Cache installed. I’ve recently removed W3 Total Cache (deleted, not just disabled), and also removed all the Roots things in the htaccess file, so it’s now a standard htaccess (other than some redirects);

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteRule ^assets/css/(.*) /wp-content/themes/magnom/assets/css/$1 [QSA,L]
RewriteRule ^assets/js/(.*) /wp-content/themes/magnom/assets/js/$1 [QSA,L]
RewriteRule ^assets/img/(.*) /wp-content/themes/magnom/assets/img/$1 [QSA,L]
RewriteRule ^plugins/(.*) /wp-content/plugins/$1 [QSA,L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

I’m stuck now, as I can’t for the life of me figure out what’s causing this. The server is my own VPS, if that helps at all.

Please help!