Wrong product on invocie when customer order.

Hi
Got a problem i dont really can describe whe i try to search resently. When my customers buy from my shop. My orders in admin panel and invoices dont get right.

Got som vqmod installed but i havent changed anything since my problem started på appear unless a onepage checkout that i will contact the authour of.

This is the problem:
Customer order from me and pays by paypal. Everithing works well and paypal sends me an email that is correct.
But when i get my order in admin panel and looks at the autogererated invoice, opencart standars. The system have added ramdom produkts to the order and treat them as a sepparate order in the order. Very confusing.

Anyone got some ide of why the system is doing this?

Using OC 1.5.1.3 with VQmod and some mods that works well since long time ago.

This is very bizarre because the invoice is generated based on data pulled from your database. Therefore...it's in theory "not" random. Can you revert back to default checkout and remove this one page checkout you have? I am pretty sure that the order being generated is not correct from the beginning. Just revert back to default and see if it fixes itself.

Thank for your reply.

Tried to order without my checkout right now but still got the same problem.

Get 1 extra line in adminpanel and order mail. Never got 2 lines. But random amout and randon product is added.

Still dont know why. Anyone got another good idea?