How can another country domain appear in a page title?

[Boostability]

I have run into something i have never seen before.

A friend has a website with two country domains, so page titles for the homepages of both websites look like this:

Rent your care here | carrentals.de

Rent your car here | carrentals.co.uk

The thing is, both are perfectly well set-up in Yoast. Yet when googling, the different URL's both appear like this:

Rent your car here | carrentals.co.uk

How could this happen?

[mememax]

what's the IP they're hosted? Maybe google is serving the same site as their IP is identical?

I see that the .de version is returning a security certificate issue so I wonder if Google may be demoting the site.

Moreover, where are you guys googling from ? Maybe google is forcing the UK version as you are searching from UK.