Orders via Paypal Standard going into Missed Orders, why?

My orders via Paypal Standards are all working via Paypal and all monies is ok but the order in Opencart does not appear unless I look in Missed ordered and it has a status of cancelled.

I checked IPN via my Paypal account the transaction looks ok, says it was sent.

What can I check?

Many thanks

Search the forum, this question has been asked and answered so many times.

I did search the forums for a long time and found the question asked but not really answered?

So I have followed the help for IPN error logs. Enabled debug error logging. Created a new order. All ok in PAypal with sent code 200. Checked error logs in Opencart and the are empty. Where do I start???

Please can someone help?

I have emailed my host (1and1) to see if they support cURL (is this something I need to install?)

I would be happy to pay someone to login and look at this issue as I need to go live with this site.

My htaccess looks like this:

Options +FollowSymlinks

# Prevent Directoy listing
Options -Indexes

# Prevent Direct Access to files
<FilesMatch "\.(tpl|ini|log)">
Order deny,allow
Deny from all
</FilesMatch>

# SEO URL Settings
RewriteEngine On
# If your opencart installation does not run on the main web folder make sure you folder it does run in ie. / becomes /shop/

RewriteBase /
RewriteRule ^sitemap.xml$ index.php?route=feed/google_sitemap [L]
RewriteRule ^googlebase.xml$ index.php?route=feed/google_base [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_URI} !.*\.(ico|gif|jpg|jpeg|png|js|css)
RewriteRule ^([^?]*) index.php?_route_=$1 [L,QSA]

UPDATE: Just downloaded the lastest version of encription.php from 1.5.4.1 and orders now coming through ok.

BUT they have order status of complete which is confusing, they should be processing, yes?