I am running a multilingual website, each lang on a different domain name. I am trying to lead all purchase requests to the checkout progress, which has its own domain too.

In order to keep Google Analytics tracking I've updated the Google Analytics code accordingly. I set the source domain to 'multiple top-level domains'.

Everything is going fine so far unless in E-commerce Overview; the "Sources / Medium" is always showing as (direct) - or the name of the source domain.

Since I am redirecting using PHP header(location:.. etc.) the Google _link method doesn't seem to be working properly - I want to focus on two questions:

1. Should I create a new profile for the checkout domain in Google Analytics? (I am now using the profile ID of the source domain even though I move to the checkout domain, si that OK?)

2. When I'm trying to pass the cookies of the source domain to the checkout domain, I notice that the Google cookies are copied to the new domain (the cookie path is .checkout-domain/) and they have the same values of the original cookies - But for some reason another set of cookies is created once I access a page with google analytics code in the checkout pages, with different values (same path). Feels like I'm doing something wrong here, so my question is - What am I doing wrong here? Does anyone have an idea how to pass the cookies to the checkout domain?