Duplicate orders one pending then confirmed

[samlf3rd]

Hello,
Joomla 3.6.5
Virtuemart 3.0.18

The site gets duplicate orders (not every single order-every few we have about 100 of these in the past 3 days!!!). We have an SSL. We use the standard PayPal plugin and we also have the PayPalAdvancedSSC. It happens for both of them.
What is going on?

Could my .htaccess file have something to do with it? Here is my .htaccess file:

Code Select Expand

RewriteCond %{HTTP_HOST} ^XX\.XXX\.XXX\.XXX
RewriteRule (.*) https://www.mysite.com/$1 [R=301,L]


RewriteEngine On
RewriteCond %{HTTP_HOST} ^mysite.com [NC]
RewriteRule ^(.*)$ https://www.mysite.com/$1 [L,R=301,NC]

RewriteCond %{HTTPS} OFF
RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI}

Redirect 301 /index.php/component/rsform/form/4-become-a-dealer https://www.mysite.com/index.php/about/become-a-dealer
Redirect 301 /index.php/component/rsform/form/5-register-your-product https://www.mysite.com/index.php/register
Redirect 301 /index.php?option=com_content&view=article&id=32 https://www.mysite.com/index.php/about/contact
Redirect 301 /component/content/article?id=16 https://www.mysite.com/index.php/about
Redirect 301 /component/content/article?id=32 https://www.mysite.com/index.php/about
Redirect 301 /test-gallery https://www.mysite.com/index.php/store
Redirect 301 /component/rsform/form/4 https://www.mysite.com/index.php/about/become-a-dealer
Redirect 301 /index.php?option=com_k2&view=item&id=3:understanding https://www.mysite.com/store

<IfModule mod_expires.c>
ExpiresActive on
ExpiresByType image/jpg "access plus 1 month"
ExpiresByType image/jpeg "access plus 1 month"
ExpiresByType image/gif "access plus 1 month"
ExpiresByType image/png "access plus 1 month"
</IfModule>